CETCO Europe Ltd Agrément Certificate 86/1650...Voltex Granules a loose form of granular sodium bentonite used to prevent the seepage of water from backfill material or mixed with

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TECHNICAL APPROVALS FOR CONSTRUCTION

APPROVAL

INSPECTION

TESTING

CERTIFICATION

CETCO Europe LtdBirch HouseScotts QuaysBirkenheadMerseyside CH41 1FBTel: 0151-606 5900 Fax: 0151-606 5932e-mail: [email protected]: www.cetcoeurope.com

British Board of Agrément tel: 01923 665300Bucknalls Lane fax: 01923 665301Garston, Watford e-mail: [email protected] WD25 9BA website: www.bbacerts.co.uk©2009

The BBA is a UKAS accredited certification body — Number 113. The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at www.bbacerts.co.uk

Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct.

VOLCLAY WATERPROOFING SYSTEM FOR STRUCTURES

VOLTEX

PRODUCT SCOPE AND SUMMARY OF CERTIFICATE

This Certificate relates to Voltex, for use in waterproofing and damp-proofing underground reinforced concrete structures.

AGRÉMENT CERTIFICATION INCLUDES:factors relating to compliance with Building • Regulations where applicablefactors relating to additional non-regulatory • information where applicableindependently verified technical specification• assessment criteria and technical investigations• design considerations• installation guidance• regular surveillance of production• formal three-yearly review.•

KEY FACTORS ASSESSEDResistance to water and water vapour — the system provides an effective barrier to the passage of liquid water and water vapour from the ground (see section 5).

Resistance to puncturing — the membrane is resistant to damage and has the ability to self-heal if punctured (see section 6).

Durability — when fully protected, the system provides an effective barrier to the transmission of water and water vapour for the life of the building in which it is incorporated (see section 11).

Agrément Certificate86/1650

Product Sheet 1

The BBA has awarded this Agrément Certificate to the company named above for the system described herein. The system has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate.

On behalf of the British Board of Agrément

Date of First issue: 17 August 2009 Simon Wroe Greg CooperOriginally certificated on 30 June 1997 Head of Approvals — Materials Chief Executive

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In the opinion of the BBA, Voltex, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations:

The Building Regulations 2000 (as amended) (England and Wales)

Requirement: A1 Loading

Comment: When adequately confined, the system contributes to satisfying this Requirement. See section 8 of this Certificate.

Requirement: C2(a) Resistance to moisture

Comment: The system is an effective barrier to water and water vapour. See section 5 of this Certificate.Requirement: Regulation 7 Materials and workmanship

Comment: The system is acceptable. See section 11 and the Installation part of this Certificate.

The Building (Scotland) Regulations 2004 (as amended)

Regulation: 8(1)(2) Fitness and durability of materials and workmanship

Comment: The use of the system satisfies the requirements of this Regulation. See sections 10 and 11 and the Installation part of this Certificate.

Regulation: 9 Building standards — constructionStandard: 1.1(a)(b) Structure

Comment: The application of the system will not adversely affect the building’s ability to transmit loadings, with reference to clauses 1.1.1(1)(2), 1.1.2(1)(2), 1.1.3(1)(2) and 1.1.4(1)(2). See section 8 of this Certificate.

Standard: 3.4 Moisture from the ground

Comment: The system is an effective barrier to liquid water and water vapour, with reference to clauses 3.4.1(1)(2), 3.4.2(1)(2), 3.4.5(1)(2), 3.4.6(1)(2) and 3.4.7(1)(2) respectively. See section 5 of this Certificate.

Regulation: 12 Building standards — conversions

Comment: All comments given for this system under Regulation 9, also apply to this Regulation, with reference to clause 0.12.1(1)(2) and Schedule 6(1)(2).

(1) Technical Handbook (Domestic). (2) Technical Handbook (Non-Domestic).

The Building Regulations (Northern Ireland) 2000 (as amended)

Regulation: B2 Fitness of materials and workmanship

Comment: The system is acceptable. See section 11 and the Installation part of this Certificate.Regulation: B3(2) Suitability of certain materials

Comment: The system does not normally require maintenance. See section 10 of this Certificate.Regulation: C4(b) Resistance to ground moisture and weather

Comment: The system is an effective barrier to liquid water and water vapour. See section 5 of this Certificate.Regulation: D1 Stability


Construction (Design and Management) Regulations 2007Construction (Design and Management) Regulations (Northern Ireland) 2007

Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligation under these Regulations.See sections: 2 Delivery and site handling (2.1 to 2.4) and 4 Practicability of installation (4.3).

Non-regulatory Information

NHBC Standards 2008NHBC accepts the use of Voltex, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors.

Zurich Building Guarantee Technical Manual 2007In the opinion of the BBA, Voltex, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements.

Regulations

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Technical Specification

1 Description1.1 Voltex is a waterproofing membrane, approximately 6.4 mm thick, consisting of two polypropylene geotextiles, a woven fabric and non-woven fabric, enclosing granular sodium bentonite at a minimum weight of 4.88 kgm–2. The two geotextiles are interlocked by a needle-punching process pushing fibres from the non-woven layer through and beyond the woven layer. This process links the geotextiles and contains and confines the bentonite (see Figure 1).

Figure 1 Cross-section through Voltex

woven geotextile needle-punched geotextile fibres

non-woven geotextile granular Volclay sodium bentonite

1.2 Voltex is manufactured in a controlled continuous process in which partially-hydrated bentonite granules are uniformly distributed between woven and non-woven geotextiles. A needle-punching process is applied, linking the geotextiles together and securing the bentonite granules within the membrane.

1.3 Other components used with Voltex include:Waterstop RX — a black-extruded strip of sodium bentonite/butyl rubber backed with a silicone release paper and • used as a water bar in construction joints and in conjunction with VoltexBentoseal — a trowel-grade sodium bentonite compound used for detailing work, eg around penetrations• Voltex Granules — a loose form of granular sodium bentonite used to prevent the seepage of water from backfill • material or mixed with water and used as a paste for sealing.

1.4 Quality control is exercised over raw materials, during manufacture and on the final products.

2 Delivery and site handling2.1 Voltex is supplied in 1.1 m wide by 5.0 m long rolls on pallets of 35 rolls, stacked horizontally and shrink wrapped. Each roll weighs between 33 kg to 38.5 kg(1).

2.2 Coils of Waterstop RX, 25 mm by 19 mm are packaged in cartons. Each carton contains six coils of 5 m length(1), each box weighs 25 kg.

2.3 Bentoseal is supplied in 14.25 litre tubs(1), each tub weighs 18 kg.

2.4 Voltex Granules are supplied in 20 kg bags.2.5 The product and components must be stored in dry conditions, under cover and away from the possibility of damage or premature contact with water. Waterstop RX should also be stored away from direct heat.(1) Weights and sizes are subject to change, users are advised to consult current manufacturer’s literature.

Assessment and Technical Investigations

The following is a summary of the assessment and technical investigations carried out on Voltex.

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Design Considerations

3 Use3.1 Voltex is satisfactory for use in waterproofing and damp-proofing underground reinforced concrete structures, and is satisfactory for Type A reinforced concrete basement construction grades 2, 3 and 4 as defined in Table 1 of BS 8102 : 1990.

3.2 The membrane stops the passage of water between the membrane and the concrete structure to which it is fixed. The membrane must be adequately confined to ensure a watertight seal is achieved in service.

3.3 Waterstop RX is satisfactory for use as a water bar in reinforced concrete construction joints, on Type B constructions as defined in Table 1 of BS 8102 : 1990. It is also used as an accessory in structures waterproofed with Voltex.

3.4 Waterstop RX is not designed for use in movement joints.

3.5 The product and components must never remain permanently exposed.

4 Practicability of installation4.1 The system should only be installed by contractors who have been trained and approved by the Certificate holder.

4.2 The membrane is easy to handle and can be cut using a sharp knife.

4.3 Voltex may be applied under most normal site conditions, including subzero temperatures and during heavy rainfall. Under wet conditions the system can withstand light construction traffic without significant extrusion of the bentonite. Slight losses at the exposed edges of a lap joint will not impair the watertightness, provided the conditions given in section 12.3 are met. Any bentonite that extrudes from the membrane will become slippery when wet which can have an adverse effect on site safety.

4.4 Waterstop RX should not be applied during heavy rainfall or where there is free-standing water.

5 Resistance to water and water vapourThe system provides an effective barrier to the passage of liquid water and water vapour from the ground.

6 Resistance to puncturingThe polypropylene geotextiles containing the bentonite are robust and resistant to normal site activities. The dropping of heavy articles will normally have no damaging effect on the membrane. Any accidental cuts will self heal when the membrane is hydrated following correct installation, provided that bentonite material is not lost from the edges of the cut. If it is thought that bentonite material has been lost, Bentoseal can be applied over the damaged area or, if the damage is more extensive, the membrane should be replaced with fresh Voltex.

7 Chemical resistance7.1 The gelling of sodium bentonite is adversely affected by the presence of electrolytes (particularly trivalent ions) and may also be affected by the presence of soluble cations such as those found in chalk or lime soils. In such cases advice should be sought from the Certificate holder.

7.2 The membrane is not affected by organic contaminants.

7.3 In chemically-contaminated areas the membrane is hydrated by deliberate soaking with mains water and leaving for two to three hours before placing the backfill or pouring the concrete.

8 Resistance to loadingProvided the membrane is adequately confined, properly hydrated and not subject to point loading, an installation beneath a foundation slab will transmit dead and imposed loads to the ground safely and without excessive deformation. In situations where point loading is anticipated the Certificate holder’s advice should be sought.

9 AdhesionWhen concrete is cast against the membrane the free ends of the needle-punched fibres become embedded in the concrete, creating a permanent bond between the concrete and membrane.

10 MaintenanceAs the system is confined by the concrete and has suitable durability (see section 11), maintenance is not required.

11 DurabilityA fully-protected Voltex membrane, when installed with the appropriate ancillary products, will provide an effective barrier to water and water vapour for the life of the building in which it is incorporated.

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Installation

12 General12.1 Voltex is installed with the woven geotextile in contact with the concrete surface to be waterproofed.

12.2 The system bonds to poured concrete to form an integral seal to prevent water migration and requires no priming, fillets or protection boards.

12.3 The formation of a continuous waterproof barrier is achieved using lap joints with a minimum overlap of 100 mm between adjoining edges and roll ends. It is recommended to stagger laps at a minimum of 300 mm to avoid four sheets overlapping in one location. All lap joints are secured by either stapling laps together, or fixing them to the base with fasteners.

12.4 Sealing around protrusions through the membrane, eg at such details as piles and service pipes, is accomplished by cutting a hole in the membrane and fitting over the protrusion, bedding the membrane onto either Bentoseal or a paste made up, in situ, by mixing Voltex Granules with water.

13 ProcedureVoltexVertical surfaces13.1 Voltex can be installed either against the outside of existing walls, or preferably applied to the inside face of shuttering to be subsequently filled with poured concrete.

13.2 On cast concrete substrates, the product is aligned horizontally (although vertical alignment is possible) and fixed through the overlaps using proprietary washer-headed fasteners. When fixed to the inside face of shuttering, the product is aligned vertically (although horizontal alignment is possible) ensuring that all laps face down, away from the flow of the poured concrete. The overlaps are secured to the shuttering using nails or staples. A minimum overlap of 100 mm should be achieved between the vertical membrane and the membrane protruding from the base slab.

13.3 Backfilling should be carried out as soon as possible after placing the Voltex. Backfill material should be free from builders’ debris and angular aggregate, and should be compacted to a minimum 85% Modified Proctor.

13.4 After backfilling, the application of the membrane is continued. The membrane should not be installed above the intended final ground level and Voltex is terminated on the concrete structure at ground level.

Horizontal surfaces13.5 Surfaces to be waterproofed should be reasonably smooth and may be damp (but free from standing water). Earth and sand substrates should be compacted to a minimum 85% Modified Proctor.

13.6 At the edge of the slab the membrane should extend vertically a minimum of 300 mm above the top surface to form an overlap with the vertical membrane.

13.7 Overlaps should be stapled or nailed to prevent displacement during concrete placement.

13.8 The concrete slab to be poured should have a minimum thickness of 150 mm.

Waterstop RXSurface preparation13.9 Joint surfaces should be clean, dry and free from cavities and spalling. Any irregularities in the surface do not normally need to be filled. If required, these can be filled with a suitable strength cement grout or mortar while the concrete is still green, and made smooth.

13.10 Waterstop RX is positioned in the centre of the reinforced concrete construction joint, ensuring that a minimum of 75 mm concrete cover is provided to all sides of the product.

Installation13.11 A strip of Waterstop RX is uncoiled and placed in position leaving the release paper temporarily intact so it can be pushed firmly in place into any undulations in the concrete surface (see Figure 2). Once sufficient product is positioned, the release paper is removed.

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Figure 2 Waterstop RX installation details

vertical wall joint Waterstop RX

Waterstop RX

kicker cast integrally with footing

footing towall joint

13.12 Continuity of consecutive strips is maintained by butt jointing.

13.13 To prevent movement during concrete placement, the strips of Waterstop RX are covered by placing Revofix mesh over the product. The successive lengths of mesh are overlapped and fixed using nails at each overlap and at a spacing of approximately 300 mm in between.

Swelling13.14 If the material exhibits considerable swelling prior to confinement in the joint, it must be replaced with new material.

Concrete casting13.15 Casting of retaining walls and floor slabs is carried out immediately after fixing Waterstop RX in position.

Technical Investigations

14 TestsVoltex14.1 A trial installation was built and observations were made of the ease of installation at corners, laps and around obstructions, and the rate and pattern of water penetration.

14.2 Tests were conducted to determine:resistance to electrolytes• resistance to rainfall (natural exposure)• resistance to rainfall (cyclic water spray with simulated traffic).•

14.3 Tests were conducted (see Table 1) to determine:bond strength between Voltex and poured concrete• stability of bentonite granules within the membrane during normal site handling.•

Table 1 Service performance

Test Mean results Method(1)

Bond strength (Nmm–1) 4.4 BS EN 28510-1

Stability (%) 1.75 BBA test method

Hydraulic conductivity (cms–1) 1 x 10–9 ASTM D 5084

Low-temperature flexibility (°C) –29 ASTM D 1970

Hydrostatic pressure (kPa) 690 ASTM D 5385

Tensile strength (N) 329 ASTM D 4595

Puncture resistance (kg) 61.3 ASTM D 4833

Water vapour transmission zero transmission University of Hertfordshire Procedure

(1) The test documents are detailed in the Bibliography.

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Waterstop RXcharacterisation• resistance to hydrostatic pressure.•

14.4 Observations were made of the ease of installation, in particular around obstructions.

15 Investigations15.1 The manufacturing process was examined, and the raw material specifications and quality control procedures established.

15.2 An assessment was made of independent reports (with the results given in Table 1) relating to:hydraulic conductivity under water pressure• low-temperature flexibility• resistance to hydrostatic pressure• mechanical properties of the geotextiles• water vapour transmission through hydrated membrane.•

15.3 Visits were made to sites in progress to assess the application properties of the system.

15.4 A survey of contractors was conducted to assess the practicability of application and the performance in use.

15.5 Existing data on the effectiveness and durability of natural (Wyoming) sodium bentonite as a waterproofing membrane were examined.

15.6 An assessment was made of the original data resulting in the issue of Certificate 83/1081.

Bibliography

BS 8102 : 1990 Code of practice for protection of structures against water from the groundBS EN 28510-1 : 1993 Methods of test for adhesives — 90º peel test for a flexible-to-rigid assembly

ASTM D 1970 : 2000 Standard specification for self-adhering polymer modified bituminous sheet materials used as steep roofing underlayment for ice dam protection

ASTM D 4595 : 1986 Test method for tensile properties of geotextiles by the wide-width strip method

ASTM D 4833 : 2000 Test method for index puncture resistance of geotextiles, geomembranes and related products

ASTM D 5084 : 2000 Test method for hydraulic conductivity of saturated porous materials using a flexible wall permeameter

ASTM D 5385 : 1993 Test method for hydrostatic pressure resistance of waterproofing membranes

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Conditions of Certification

16 Conditions16.1 This Certificate:

relates only to the product/system that is named and described on the front page• is granted only to the company, firm or person named on the front page — no other company, firm or person may • hold or claim any entitlement to this Certificateis valid only within the UK• has to be read, considered and used as a whole document —• it may be misleading and will be incomplete to be selectiveis copyright of the BBA• is subject to English law.•

16.2 Publications and documents referred to in this Certificate are those that the BBA deems to be relevant at the date of issue or re-issue of this Certificate and include any: Act of Parliament; Statutory Instrument; Directive; Regulation; British, European or International Standard; Code of Practice; manufacturers’ instructions; or any other publication or document similar or related to the aforementioned.

16.3 This Certificate will remain valid for an unlimited period provided that the product/system and the manufacture and/or fabrication including all related and relevant processes thereof:

are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA• continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine• are reviewed by the BBA as and when it considers appropriate.•

16.4 In granting this Certificate, the BBA is not responsible for:the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any • other product/systemthe right of the Certificate holder to manufacture, supply, install, maintain or market the product/system• individual installations of the product/system, including the nature, design, methods and workmanship of or related • to the installationthe actual works in which the product/system is installed, used and maintained, including the nature, design, • methods and workmanship of such works.

16.5 Any information relating to the manufacture, supply, installation, use and maintenance of this product/system which is contained or referred to in this Certificate is the minimum required to be met when the product/system is manufactured, supplied, installed, used and maintained. It does not purport in any way to restate the requirements of the Health & Safety at Work etc Act 1974, or of any other statutory, common law or other duty which may exist at the date of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care. In granting this Certificate, the BBA does not accept responsibility to any person or body for any loss or damage, including personal injury, arising as a direct or indirect result of the manufacture, supply, installation, use and maintenance of this product/system.


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APPROVAL

INSPECTION

TESTING

CERTIFICATION






WATERSTOP RX


This Certificate relates to Waterstop RX, a sodium bentonite/butyl rubber water bar for use in waterproofing and damp-proofing construction joints in underground structures.


KEY FACTORS ASSESSEDResistance to water pressure — the product provides an effective barrier to the passage of liquid water from the ground in construction joints (see section 5).

Durability — when fully protected, the product provides an effective barrier to the transmission of water in construction joints for the life of the building in which it is incorporated (see section 7).


Product Sheet 2

The BBA has awarded this Agrément Certificate to the company named above for the product described herein. The product has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate.



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In the opinion of the BBA, Waterstop RX, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations:



Comment: The product is an effective barrier to water in construction joints. See section 5 of this Certificate.Requirement: Regulation 7 Materials and workmanship

Comment: The product is acceptable. See section 7 and the Installation part of this Certificate.



Comment: The use of the product satisfies the requirements of this Regulation. See sections 6 and 7 and the Installation part of this Certificate.

Regulation: 9 Building standards — constructionStandard: 3.4 Moisture from the ground

Comment: The product is an effective barrier to water in construction joints, with reference to clauses 3.4.1(1)(2), 3.4.2(1)(2), 3.4.5(1)(2), 3.4.6(1)(2) and 3.4.7(1)(2) respectively. See section 5 of this Certificate.


Comment: All comments given for this product under Regulation 9, also apply to this Regulation, with reference to clause 0.12.1(1)(2) and Schedule 6(1)(2).




Comment: The product is acceptable. See section 7 and the Installation part of this Certificate.Regulation: B3(2) Suitability of certain materials

Comment: The product does not normally require maintenance. See section 6 of this Certificate.Regulation: C4(b) Resistance to ground moisture and weather

Comment: The product is an effective barrier to water in construction joints. See section 5 of this Certificate.


Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligation under these Regulations.See section: 2 Delivery and site handling (2.1).


NHBC Standards 2008NHBC accepts the use of Waterstop RX, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors.

Zurich Building Guarantee Technical Manual 2007In the opinion of the BBA, Waterstop RX, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements.


1 Description1.1 Waterstop RX is a black, extruded strip of sodium bentonite/butyl rubber with dimensions 25 mm by 20 mm and 15 mm by 10 mm cross-section, with one side backed by a silicone treated paper.

1.2 Quality control is exercised over raw materials, during manufacture and on the final product.

Regulations

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2 Delivery and site handling2.1 Coils of Waterstop RX are packaged in cartons, each carton contains six coils of 5 m length(1), each box weighs 25 kg.(1) Weights and sizes are subject to change, users are advised to consult current manufacturer’s literature.

2.2 The product should be stored away from direct heat, in dry conditions, under cover and away from the possibility of damage or premature contact with water.


The following is a summary of the assessment and technical investigations carried out on Waterstop RX.


3 UseThe product is satisfactory for use as a water bar;

as part of a Volclay waterproofing installation, • for Type A basement construction in grades 2, 3 and 4 as defined in Table 1 of BS 8102 : 1990, • for construction joints in reinforced concrete structures, or • for Type B structures as defined in BS 8102 to waterproof basements.•



5 Resistance to water pressureBoth in its original condition and after hydration, Waterstop RX provides an effective barrier to liquid water in construction joints of reinforced concrete.

6 MaintenanceAs the product is confined by the concrete and has suitable durability (see section 7), maintenance is not required.

7 DurabilityWhen fully protected, Waterstop RX, provides an effective barrier to the transmission of liquid water in construction joints, for the life of the building in which it is incorporated.

Installation

8 General8.1 Waterstop RX should not be applied during heavy rainfall or where there is free-standing water.

8.2 The product is not designed for use in movement joints.

8.3 The product must never remain permanently exposed.

9 ProcedureSurface preparation9.1 Joint surfaces should be clean, dry and free from cavities and spalling. Any irregularities in the surface do not normally need to be filled. If required, these can be filled with a suitable strength cement grout or mortar while the concrete is still green, and made smooth.



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Waterstop RX








10 TestsThe following tests were carried out:

characterisation• resistance to hydrostatic pressure, and observations were made of the ease of installation, in particular around • obstructions.

11 Investigations11.1 Details were obtained of the manufacturing process, including the methods adopted for quality control.


11.3 Visits were made to a site in progress to assess the practicability of installation.

11.4 A survey of known users was conducted to assess the performance in use.


Bibliography

BS 8102 : 1990 Code of practice for protection of structures against water from the ground

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APPROVAL

INSPECTION

TESTING

CERTIFICATION






VOLTEX DS


This Certificate relates to Voltex DS, for use in waterproofing and damp-proofing underground reinforced concrete structures.






Product Sheet 3




Page 2 of 8

In the opinion of the BBA, Voltex DS, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations:


























NHBC Standards 2008NHBC accepts the use of Voltex DS, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors.

Zurich Building Guarantee Technical Manual 2007In the opinion of the BBA, Voltex DS, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements.

Regulations

Page 3 of 8


1 Description1.1 Voltex DS is a waterproofing membrane, approximately 6.4 mm thick, consisting of two polypropylene geotextiles, a woven fabric and non-woven fabric, enclosing granular sodium bentonite at a minimum weight of 4.88 kgm–2. The two geotextiles are interlocked by a needle-punching process pushing fibres from the non-woven layer through and beyond the woven layer. This process links the geotextiles and contains and confines the bentonite. An HDPE liner is integrally bonded to the non-woven geotextile (see Figure 1).

Figure 1 Cross-section through Voltex DS



HDPE liner

1.2 Voltex DS is manufactured in a controlled continuous process. Quality control tests are carried out on the separate components of the system, and on the finished membrane.

1.3 Other components used with Voltex DS include:Waterstop RX — a black, extruded strip of sodium bentonite/butyl rubber backed with a silicone release paper and • used as a water bar in construction joints and in conjunction with Voltex DSBentoseal — a trowel-grade sodium bentonite compound used for detailing work, eg around penetrations• Voltex Granules — a loose form of granular sodium bentonite used to prevent the seepage of water from backfill • material or mixed with water and used as a paste for sealing.


2 Delivery and site handling2.1 Voltex DS is supplied in 1.1 m wide by 5.0 m long rolls on pallets of 35 rolls, stacked horizontally and shrink wrapped. Each roll weighs between 35 kg to 40 kg(1).



2.4 Voltex Granules are supplied in 20 kg bags.

2.5 The product and components must be stored in dry conditions, under cover and away from the possibility of damage or premature contact with water. Waterstop RX should also be stored away from direct heat.(1) Weights and sizes are subject to change, users are advised to consult current manufacturer’s literature.


The following is a summary of the assessment and technical investigations carried out on Voltex DS.

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3 Use3.1 Voltex DS is satisfactory for use in waterproofing and damp-proofing underground reinforced concrete structures and is satisfactory for Type A reinforced concrete basement construction grades 2, 3 and 4 as defined in Table 1 of BS 8102 : 1990.

3.2 The membrane will not permit the passage of water between the membrane and the concrete structure to which it is fixed. The membrane must be adequately confined to ensure a watertight seal is achieved in service.

3.3 Waterstop RX is satisfactory for use as a water bar in reinforced concrete construction joints, on Type B constructions as defined in Table 1 of BS 8102 : 1990. It is also used as an accessory in structures waterproofed with Voltex DS.





4.3 Voltex DS may be applied under most normal site conditions, including subzero temperatures and during heavy rainfall. Under wet conditions the system can withstand light construction traffic without significant extrusion of the bentonite. Slight losses at the exposed edges of a lap joint will not impair the watertightness, provided the conditions given in section 12.3 are met. Any bentonite that extrudes from the membrane will become slippery when wet which can have an adverse effect on site safety.



6 Resistance to puncturingThe system is robust and resistant to normal site activities. The dropping of heavy articles will normally have no damaging effect on the membrane. Any accidental cuts will self heal when the membrane is hydrated following correct installation, provided that bentonite material is not lost from the edges of the cut. If bentonite material has or may have been lost, a patch of Voltex DS is applied, and secured by nailing over the damaged area, ensuring that the patch extends a minimum of 100 mm each side of the damaged area. If the damage is more extensive, the membrane should be replaced with fresh Voltex DS.




8 Resistance to loadingProvided the membrane is adequately confined, properly hydrated and not subject to point loading, an installation beneath a foundation slab will transmit dead and imposed loads to the ground safely and without excessive deformation. In situations where point loading is anticipated the Certificate holder’s advice should

be sought.



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11 DurabilityA fully-protected Voltex DS membrane, when installed with the appropriate ancillary products, will provide an effective barrier to water and water vapour for the life of the building in which it is incorporated.

Installation

12 General12.1 Voltex DS is installed with the woven geotextile in contact with the concrete surface to be waterproofed.


12.3 The formation of a continuous waterproof barrier is achieved using lap joints with a minimum overlap of 100 mm between adjoining edges and 300 mm between roll ends. It is recommended to stagger laps at a minimum of 300 mm to avoid four sheets overlapping in one location. All lap joints are secured by either stapling laps together, or fixing them to the base with fasteners.


13 ProcedureVoltex DSVertical surfaces13.1 Voltex DS can be installed either against the outside of existing walls, or preferably applied to the inside face of shuttering to be subsequently filled with poured concrete.


13.3 Backfilling should be carried out as soon as possible after placing the Voltex DS. Backfill material should be free from builders’ debris and angular aggregate, and should be compacted to a minimum 85% Modified Proctor.

13.4 After backfilling, the application of the membrane is continued. The membrane should not be installed above the intended final ground level and Voltex DS is terminated on the concrete structure at ground level.






13.10 Waterstop RX is positioned in the centre of the reinforced concrete construction joint, ensuring that a minimum of 75 mm concrete cover is provided to all sides of the product. Installation13.11 A strip of Waterstop RX is uncoiled and placed in position leaving the release paper temporarily intact so it can be pushed firmly in place into any undulations in the concrete surface (see Figure 2). Once sufficient product is positioned, the release paper is removed.

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Waterstop RX








14 TestsTests were conducted to determine:

resistance of lap joints to water penetration • resistance to rainfall (natural exposure)• resistance to puncture damage • weight per unit area of the membrane• weight per unit area of bentonite.•


15.2 An assessment was made of existing data relating to the performance of the bentonite geotextile.


Bibliography


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Page 8 of 8


Page 1 of 6


APPROVAL

INSPECTION

TESTING

CERTIFICATION






REDSTOP WATERSTOP


This Certificate relates to Redstop Waterstop a sodium bentonite/butyl rubber water bar, for use in waterproofing and damp-proofing construction joints in underground structures.


KEY FACTORS ASSESSEDResistance to water and water vapour — the product provides an effective barrier to the passage of liquid water from the ground in construction joints (see section 5).



Product Sheet 4




Page 2 of 6

In the opinion of the BBA, Redstop Waterstop, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations:





















NHBC Standards 2008NHBC accepts the use of Redstop Waterstop, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors.

Zurich Building Guarantee Technical Manual 2007In the opinion of the BBA, Redstop Waterstop, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements.

Regulations

Page 3 of 6


1 Description1.1 Redstop Waterstop is a black extruded strip of sodium bentonite/butyl rubber with dimensions 25 mm by 20 mm and 15 mm by 10 mm cross-section, with one side backed by a silicone treated paper.


2 Delivery and site handling2.1 Coils of Redstop Waterstop are packaged in cartons, each carton contains six coils of 5 m length(1), each box weighs 25 kg.(1) Weights and sizes are subject to change, users are advised to consult current manufacturer’s literature.

2.2 The product must be stored away from direct heat, in dry conditions, under cover and away from the possibility of damage or premature contact with water.


The following is a summary of the assessment and technical investigations carried out on Redstop Waterstop.


3 UseThe product is satisfactory for use as a water bar:

as part of a Volclay waterproofing installation, • for Type A basement construction grades 2, 3 and 4 as defined in Table 1 of BS 8102 : 1990, • for construction joints in reinforced concrete structures, or• for Type B structures as defined in BS 8102 to waterproof basements.•


4.2 Redstop Waterstop should not be applied during heavy rainfall or where there is free-standing water.

5 Resistance to water pressureBoth in its original condition and after hydration, Volclay Redstop Waterstop will provide an effective barrier to liquid water in construction joints of reinforced concrete.


7 DurabilityWhen fully protected, Redstop Waterstop, will provide an effective barrier to the transmission of liquid water in construction joints, for the life of the building in which it is incorporated.

Installation

8 General8.1 Redstop Waterstop should not be applied during heavy rainfall or where there is free-standing water.



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9 ProcedureSurface preparation9.1 Joint surfaces should be clean, dry and free from cavities and spalling. Any irregularities in the surface do not normally need to be filled. If required, these can be filled with a suitable strength cement grout or mortar while the concrete is still green, and made smooth.

9.2 Redstop Waterstop is positioned in the centre of the reinforced concrete construction joint, ensuring that a minimum of 75 mm concrete cover is provided to all sides of the product.

Installation9.3 A strip of Redstop Waterstop is uncoiled and placed in position leaving the release paper temporarily intact so it can be pushed firmly in place into any undulations in the concrete surface (see Figure 1). Once sufficient product is positioned, the release paper is removed.

Figure 1 Redstop Waterstop installation details


9.5 To prevent movement during concrete placement, the strips of Redstop Waterstop are covered by placing Revofix mesh over the product. The successive lengths of mesh are overlapped and fixed using nails at each overlap and at a spacing of approximately 300 mm in between.


Concrete casting9.7 Casting of retaining walls and floor slabs is carried out immediately after fixing Redstop Waterstop in position.


10 TestsThe following tests were carried out:

characterisation• resistance to hydrostatic pressure, and observations were made of the ease of installation, in particular around • obstructions.



11.3 Visits were made to a site in progress to assess the practicability of installation.

11.4 A survey of known users was conducted to assess the performance in use.


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Bibliography


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APPROVAL

INSPECTION

TESTING

CERTIFICATION






BIGSTOP WATERSTOP


This Certificate relates to Bigstop Waterstop, a sodium bentonite/butyl rubber water bar for use in waterproofing and damp-proofing construction joints in underground structures.


KEY FACTORS ASSESSEDResistance to water and water vapour — the product provides an effective barrier to the passage of liquid water from the ground in construction joints (see section 5).



Product Sheet 5



Date of First issue: 17 August 2009 Simon Wroe Greg CooperOriginally certificated on 31 May 2000 Head of Approvals — Materials Chief Executive

Page 2 of 6

In the opinion of the BBA, Bigstop Waterstop, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations:





















NHBC Standards 2008NHBC accepts the use of Bigstop Waterstop, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors.

Zurich Building Guarantee Technical Manual 2007In the opinion of the BBA, Bigstop Waterstop, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements.

Regulations

Page 3 of 6


1 Description1.1 Bigstop Waterstop is a heavy-duty, blue, extruded strip of sodium bentonite/butyl rubber with dimensions 30 mm by 40 mm, with one side backed by a silicone-treated paper.


2 Delivery and site handling2.1 Coils of Bigstop Waterstop are packaged in cartons, each carton contains three coils of 3 m length(1), each box weighs 25 kg.(1) Weights and sizes are subject to change, users are advised to consult current manufacturer’s literature.

2.2 The product must be stored away from direct heat, in dry conditions, under cover and away from the possibility of damage or premature contact with water.


The following is a summary of the assessment and technical investigations carried out on Bigstop Waterstop.


3 Use3.1 The product is satisfactory for use as a water bar:

as part of a Volclay waterproofing installation, • for Type A basement construction in grades 2, 3 and 4 as defined in Table 1 of BS 8102 : 1990, • for construction joints in reinforced concrete structures, or • for Type B structures as defined in BS 8102 to waterproof basements.•

3.2 The product is used in heavily reinforced subterranean concrete constructions such as tunnels and other large civil engineering structures.


4.2 Bigstop Waterstop should not be applied during heavy rainfall or where there is free-standing water.

5 Resistance to water pressureBoth in its original condition and after hydration, Bigstop Waterstop will provide an effective barrier to liquid water in construction joints of reinforced concrete.


7 DurabilityWhen fully protected, Bigstop Waterstop, will provide an effective barrier to the transmission of liquid water in construction joints, for the life of the building in which it is incorporated.

Page 4 of 6

Installation

8 General8.1 Bigstop Waterstop should not be applied during heavy rainfall or where there is free-standing water.



9 ProcedureSurface preparation9.1 Scabbling the joints is recommended. Joint surfaces should be clean, dry, free from cavities and spalling. Bigstop Waterstop can tolerate uneven concrete surfaces, but any major irregularities in the surface should be filled with cement grout or mortar.

9.2 Depending on the situation, Bigstop Waterstop is applied to:footings to wall joints — on the inside of the outermost reinforcing bars but not in the keyway (see Figure 1) • basement slab joints — below the reinforcing bars (and attached to these if necessary)• vertical wall joints — from the base upwards normally inside the outermost reinforcing bars.•

Figure 1 Bigstop Waterstop installation details

9.3 Bigstop Waterstop is positioned near the outside face or in the centre of the reinforced concrete construction joint, ensuring that a minimum of 150 mm concrete cover is provided to all sides of the product.

Installation9.4 A strip of Bigstop Waterstop is uncoiled and placed in position leaving the release paper temporarily intact so it can be pushed firmly in place in to any undulations in the concrete surface (see Figure 1). Once sufficient product is positioned, the release paper is removed.


Page 5 of 6

9.6 To prevent movement during concrete placement, the strips of Bigstop Waterstop are covered by placing Revofix mesh over the product. The successive lengths of mesh are overlapped and fixed using nails at each overlap and at a spacing of approximately 300 mm in between.


Concrete casting9.8 Casting of retaining walls and floor slabs is carried out immediately after fixing Bigstop Waterstop in position.


10 TestsData from the following tests were examined:

characterisation • resistance to hydrostatic pressure.•


11.2 Existing data on the effectiveness and durability of natural (Wyoming) sodium bentonite were examined.

11.3 Visits were made to a site in progress to assess the practicability of use and in particular the ease of installation around obstructions.


Bibliography


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APPROVAL

INSPECTION

TESTING

CERTIFICATION






COMBISEAL-T


This Certificate relates to CombiSeal-T, for use in waterproofing and damp-proofing underground reinforced concrete structures.






Product Sheet 6



Date of First issue: 17 August 2009 Simon Wroe Greg CooperOriginally certificated on 2 August 2004 Head of Approvals — Materials Chief Executive

Page 2 of 8

In the opinion of the BBA, CombiSeal-T, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations:


























NHBC Standards 2008NHBC accepts the use of CombiSeal-T, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors.

Zurich Building Guarantee Technical Manual 2007In the opinion of the BBA, CombiSeal-T, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements.

Regulations

Page 3 of 8


1 Description1.1 CombiSeal-T is a waterproofing membrane, approximately 6.4 mm thick, consisting of two polypropylene geotextiles, a woven fabric and non-woven fabric, enclosing granular sodium bentonite at a minimum weight of 4.88 kgm–2. The two geotextiles are interlocked by a needle-punching process pushing fibres from the non-woven layer through and beyond the woven layer. This process links the geotextiles and contains and confines the bentonite, an HDPE liner is integrally bonded to the non-woven geotextile, (see Figure 1).

Figure 1 Cross-section through CombiSeal-T



HDPE liner

1.2 CombiSeal-T is manufactured in a controlled continuous process. Quality control tests are carried out on the separate components of the system, and on the finished membrane.

1.3 Other components used with CombiSeal-T include:Waterstop RX — a black, extruded strip of sodium bentonite/butyl rubber backed with a silicone release paper and • used as a water bar in construction joints and in conjunction with CombiSeal-TBentoseal — a trowel-grade sodium bentonite compound used for detailing work, eg around penetrations• Voltex Granules — a loose form of granular sodium bentonite used to prevent the seepage of water from backfill • material or mixed with water and used as a paste for sealing.


2 Delivery and site handling2.1 CombiSeal-T is supplied in 1.1 m wide by 5.0 m long rolls on pallets of 35 rolls, stacked horizontally and shrinkwrapped. Each roll weighs between 35 kg to 40 kg(1).






The following is a summary of the assessment and technical investigations carried out on CombiSeal-T.

Page 4 of 8


3 Use3.1 CombiSeal-T is satisfactory for use in waterproofing and damp-proofing underground reinforced concrete structures and is satisfactory for Type A reinforced concrete basement construction grades 2, 3 and 4 as defined in Table 1 of BS 8102 : 1990.

3.2 The membrane stops the passage of water between the membrane and the concrete structure to which it is fixed. The membrane must be adequately confined to ensure a watertight seal is achieved in service.

3.3 Waterstop RX is satisfactory for use as a water bar in reinforced concrete construction joints, on Type B constructions as defined in Table 1 of BS 8102 : 1990. It is also used as an accessory in structures waterproofed with CombiSeal-T.





4.3 CombiSeal-T may be applied under most normal site conditions, including subzero temperatures and during heavy rainfall. Under wet conditions the system can withstand light construction traffic without significant extrusion of the bentonite. Slight losses at the exposed edges of a lap joint will not impair the watertightness, provided the conditions given in section 12.3 are met. Any bentonite that extrudes from the membrane will become slippery when wet which can have an adverse effect on site safety.



6 Resistance to puncturingThe system is robust and resistant to normal site activities. The dropping of heavy articles will normally have no damaging effect on the membrane. Any accidental cuts will self heal when the membrane is hydrated following correct installation, provided that bentonite material is not lost from the edges of the cut. If it is thought that bentonite material has been lost, a patch of CombiSeal-T is applied, and secured by nailing over the damaged area, ensuring that the patch extends a minimum of 100 mm each side of the damaged area. If the damage is more extensive, the membrane should be replaced with fresh CombiSeal-T.




8 Resistance to loadingProvided the membrane is adequately confined, properly hydrated and not subject to point loading, an installation beneath a foundation slab will transmit dead and imposed loads to the ground safely and without excessive deformation. In situations where point loading is anticipated the Certificate holder’s advice should be

sought.



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11 DurabilityA fully-protected CombiSeal-T membrane, when installed with the appropriate ancillary products, will provide an effective barrier to water and water vapour for the life of the building in which it is incorporated.

Installation

12 General12.1 CombiSeal-T is installed with the woven geotextile in contact with the concrete surface to be waterproofed.


12.3 The formation of a continuous waterproof barrier is achieved using lap joints with a minimum overlap of 100 mm between adjoining edges and 300 mm between roll ends. It is recommended to stagger laps at a minimum of 300 mm to avoid four sheets overlapping in one location. All lap joints are secured by either stapling laps together, or fixing them to the base with fasteners.


13 ProcedureCombiSeal-TVertical surfaces13.1 CombiSeal-T can be installed either against the outside of existing walls, or preferably applied to the inside face of shuttering to be subsequently filled with poured concrete.


13.3 Backfilling should be carried out as soon as possible after placing the CombiSeal-T. Backfill material should be free from builders’ debris and angular aggregate, and should be compacted to a minimum 85% Modified Proctor.

13.4 After backfilling, the application of the membrane is continued. The membrane should not be installed above the intended final ground level and CombiSeal-T is terminated on the concrete structure at ground level.








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Waterstop RX








14 TestsTests were conducted to determine: • resistance of lap joints to water penetration • resistance to rainfall (natural exposure)

resistance to puncture damage • weight per unit area of the membrane• weight per unit area of bentonite.•


15.2 An assessment was made of existing data relating to the performance of the bentonite geotextile.

15.3 An assessment was made of the original data resulting in the issue of Certificate 83/1081.hydraulic conductivity under water pressure • low-temperature flexibility• resistance to hydrostatic pressure • mechanical properties of the geotextiles• water vapour transmission through hydrated membrane.•


Bibliography


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Page 1 of 8


APPROVAL

INSPECTION

TESTING

CERTIFICATION






VOLCLAY TYPE 1 PANEL


This Certificate relates to Volclay Type 1 Panel, for use in waterproofing and damp-proofing underground reinforced concrete structures.



Resistance to puncturing — the panel has the ability to self-heal if punctured (see section 6).



Product Sheet 7



Date of First issue: 17 August 2009 Simon Wroe Greg CooperOriginally certificated on 2 September 1986 Head of Approvals — Materials Chief Executive

Page 2 of 8

In the opinion of the BBA, Volclay Type 1 Panel, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations:





Comment: The system is an effective barrier to water and water vapour. See sections 5.1 and 5.2 of this Certificate.Requirement: Regulation 7 Materials and workmanship








Comment: The system is an effective barrier to liquid water and water vapour, with reference to clauses 3.4.1(1)(2), 3.4.2(1)(2), 3.4.5(1)(2), 3.4.6(1)(2) and 3.4.7(1)(2) respectively. See sections 5.1 and 5.2 of this Certificate.







Comment: The system does not normally require maintenance. See section 10 of this CertificateRegulation: C4(b) Resistance to ground moisture and weather

Comment: The system is an effective barrier to liquid water and water vapour. See sections 5.1 and 5.2 of this Certificate.

Regulation: D1 Stability



Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligation under these Regulations.See section: 2 Delivery and site handling (2.1 to 2.5).


NHBC Standards 2008NHBC accepts the use of Volclay Type 1 Panel, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors.

Zurich Building Guarantee Technical Manual 2007In the opinion of the BBA, Volclay Type 1 Panel, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements.

Regulations

Page 3 of 8


1 Description1.1 Volclay Type 1 Panel, the membrane component of the Volclay Waterproofing System, comprises a waterproofing corrugated cardboard panel, 1220 mm square and 5 mm thick, with the flutes filled with dry granular sodium bentonite and sealed at the edges (see Figure 1).

Figure 1 Cross-section through Volclay Type 1 Panel

kraft board covers

sealed edge

corrugated board core

Volclay sodium bentonite filling

1.2 Other components used with Volclay Type 1 Panel include:Waterstop RX — a black, extruded strip of sodium bentonite/butyl rubber backed with a silicone release paper and • used as a water bar in construction joints and in conjunction with Volclay Type 1 PanelBentoseal — a trowel-grade sodium bentonite compound used for detailing work, eg around penetrations• Voltex Granules — a loose form of granular sodium bentonite used to prevent the seepage of water from backfill • material or mixed with water and used as a paste for sealingVolclay Hydrobar Tubes — a water soluble polyvinyl alcohol tube, filled with natural sodium bentonite and sealed • at each end. It is used to seal constructions at the base of walls waterproofed with Volclay panels.


2 Delivery and site handling2.1 Volclay Type 1 Panels are 1220 mm square and 5 mm thick, each panel weighs approximately 8 kg. The panels are packed horizontally on pallets protected by cardboard wrapping and corner pieces. Each pallet carries 125 panels.




2.5 Volclay Hydrobar Tubes are approximately 610 mm long and 50 mm in diameter. The tubes are packaged in cartons. Each carton contains 16 tubes, each box weighs 25 kg.


Assessment and Technical InvestigationsThe following is a summary of the assessment and technical investigations carried out on Volclay Type 1 Panel.

Page 4 of 8


3 Use3.1 Volclay Type 1 Panel is satisfactory for use in waterproofing and damp-proofing underground reinforced concrete structures and is satisfactory for Type A reinforced concrete basement construction grades 2, 3 and 4 as defined in Table 1 of BS 8102 : 1990.

3.2 The system stops the passage of water between the panel and the concrete structure to which it is fixed. The panel must be adequately confined to ensure a watertight seal is achieved in service.

3.3 Waterstop RX is satisfactory for use as a water bar in reinforced concrete construction joints, on Type B constructions as defined in Table 1 of BS 8102 : 1990. It is also used as an accessory in structures waterproofed with Volclay Type 1 Panel.




4.2 The panel is easy to handle and can be cut using a sharp knife.

4.3 Volclay Type 1 Panel may be applied under most normal site conditions, including subzero temperatures, but must not be installed during heavy rainfall.


5 Resistance to water and water vapour5.1 The system provides an effective barrier to the passage of liquid water and water vapour from the ground.

5.2 A single layer of the panels with lap joints, will provide an effective barrier to the passage of liquid water up to 1 bar. At higher pressures, a double layer of panels, with staggered joints, will be required.

6 Resistance to puncturingIf a dry panel is punctured, provided no bentonite is lost, it will self-heal when hydrated. If bentonite is lost, the waterproofing properties of the panel will be reduced. However, these properties can be restored by applying a layer of Bentoseal or a second layer of panels to the damaged area or by replacement of the damaged panel.


7.2 The panel is not affected by organic contaminants.

7.3 In chemically-contaminated areas either a double layer of panels is used or the panels are hydrated by deliberate soaking with mains water. In badly contaminated areas both techniques are used.

8 Resistance to loadingProvided the panel is adequately confined, properly hydrated and not subject to point loading, an installation beneath a foundation slab will transmit dead and imposed loads to the ground safely and without excessive deformation. In situations where point loading is anticipated the Certificate holder’s advice should be sought.

9 Resistance to substrate movementThe panels are not bonded to the substrate and can thus accommodate any likely structural movement in service, eg differential settlement or movement at joints.


11 DurabilityA fully-protected Volclay Type 1 Panel, when installed with the appropriate ancillary products, will provide an effective barrier to water and water vapour for the life of the building in which it is incorporated.

Page 5 of 8

Installation

12 General12.1 Surfaces to be waterproofed need not be clean and may be damp but must be free from cavities, projecting ribs and standing water.

12.2 Panels are cut as necessary to avoid pipes, conduits, ducts or other penetrations, but the continuity of the membrane is maintained by a 25 mm deep trowel application of Bentoseal.

12.3 At joints, Waterstop RX is included in the joint (see sections 13.8 to 13.14) or a proprietary water bar and an extra layer of Volclay Type 1 panels is applied (see Figure 2).

Figure 2 Concrete wall plan — proprietary water bar

13 ProcedureVolclay Type 1 PanelVertical surfaces13.1 Cracks wider than 1 mm and discontinuities are sealed with Bentoseal. Volclay Type 1 panels are then fixed to the foundation wall using hard nails, or are retained in position with backfill. Panels are overlapped up to the marked margin and, at corners, panels are bent along the line of the flutes. Where cut across the flutes, panels are wetted along the cut to prevent sodium bentonite loss.

13.2 A second course of Volclay Type 1 panels is installed, overlapping the first, with the joints staggered. When panels are not used under the structure, Hydrobar tubes are then laid at the base of the wall in accordance with the Certificate holder’s instructions (see Figure 3). Any discontinuities present in the membrane are sealed with a trowel application of Bentoseal.

Figure 3 Volclay Hydrobar Tube installation details

13.3 Normally, backfill is applied immediately. A bead of backfill is tamped over the Volclay Hydrobar Tube at the base and the backfill is applied and compacted to at least 85% Modified Proctor, to within 50 mm of the panels’ edge. Backfill must be well-graded, rounded material, not exceeding 50 mm and must be free from angular broken material; otherwise panels must be protected by boards. If backfill cannot be applied immediately, Volclay Type 1 panels are protected against rainfall by polythene sheet. Panels damaged mechanically or by wetting are replaced before backfilling.

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13.4 After backfilling, the application of Volclay Type 1 panels is continued. Panels must not be installed above the intended final ground level. The installation is completed with a flashing (or other technique).

Beneath the base of structures designed to resist hydrostatic pressure 13.5 The substrate is levelled and finished with a blinding of either 100 mm granular material or 50 mm concrete. Type 1 panels are laid, overlapping, with successive rows staggered. Volclay Type 1 panels may be protected from rainwater during installation with polythene sheet. Care is taken to avoid damage to the panels when the slab is poured and vibrated. A blinding screed is applied where heavy reinforcement is to be placed. Particular attention is necessary to ensure continuity of protection at junctions with walls (see Figure 4).

Figure 4 Hydrostatic structure

Volclay Type 1 panels


On roofs of underground structures (tunnels, reservoirs, etc)13.7 Volclay Type 1 panels are overlapped, nailed in position, and covered with compacted earth, sand or gravel (maximum aggregate size 18 mm) with a minimum depth of 450 mm (if trafficking is not envisaged, a 300 mm depth of cover is adequate).






Waterstop RX



Page 7 of 8






14 TestsVolclay Type 1 Panel14.1 The following tests were carried out as part of the assessment resulting in the issue of the previous Certificate 83/1081:

a trial installation was built using the Volclay system and observations were made of the ease of installation at • corners, laps and around obstructions, and the rate and pattern of water penetrationtests were conducted to determine the resistance to electrolytes.•

14.2 A trial installation was built and observations were made of the ease of installation at corners, laps and around obstructions, and the rate and pattern of water penetration

Volclay Hydrobar Tubes 14.3 Volclay Hydrobar Tubes were included as part of a trial installation and rate of water penetration test conducted on Volclay panels.

14.4 An assessment was made on Volclay Hydrobar Tubes and Voltex Granules, using relevant data from the previous assessments.

15 Investigations15.1 The following investigations were carried out as a part of the assessment resulting in the issue of the previous Certificate 83/1081:

the manufacturing process was examined, and the raw material specifications and quality control procedures • establishedan assessment was made of reports from English, American and German sources, concerning environmental cycling, • resistance to damage, resistance to hydrostatic pressure, pressure caused by hydration, effect of electrolytes, and durabilitya visit was made to a site in progress.•

15.2 As part of the assessment resulting in the issue of this Certificate a survey of contractors was conducted to assess the product’s performance in use and a re-examination was made of data and investigations on which the previous Certificate was based. The conclusions drawn from the original data remain valid.

15.3 A test was conducted by Hatfield Polytechnic, under the BBA’s supervision, to determine the water vapour resistance of a Volclay Type 1 panel on a 150 mm concrete structure.

15.4 No failure of the product in use has been reported to the BBA.

15.5 Regular factory inspections have been carried out to ensure that quality is being maintained.

Bibliography


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Page 1 of 8


APPROVAL

INSPECTION

TESTING

CERTIFICATION






VOLCLAY TYPE 1F PANEL


This Certificate relates to Volclay Type 1F Panel, for use in waterproofing and damp-proofing underground reinforced concrete structures.



Resistance to puncturing — the panel has the ability to self-heal if punctured (see section 6).



Product Sheet 8



Date of First issue: 17 August 2009 Simon Wroe Greg CooperOriginally certificated on17 December 1993 Head of Approvals — Materials Chief Executive

Page 2 of 8

In the opinion of the BBA, Volclay Type 1F Panel, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations:





Comment: The system is an effective barrier to water and water vapour. See sections 5.1 and 5.2 of this Certificate.Requirement: Regulation 7 Materials and workmanship








Comment: The system is an effective barrier to liquid water and water vapour, with reference to clauses 3.4.1(1)(2), 3.4.2(1)(2), 3.4.5(1)(2), 3.4.6(1)(2) and 3.4.7(1)(2) respectively. See sections 5.1 and 5.2 of this Certificate.







Comment: The system is an effective barrier to liquid water and water vapour. See sections 5.1 and 5.2 of this Certificate.

Regulation: D1 Stability



Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligation under these Regulations.See section: 2 Delivery and site handling (2.1 to 2.5).


NHBC Standards 2008NHBC accepts the use of Volclay Type 1F Panel, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors.

Zurich Building Guarantee Technical Manual 2007In the opinion of the BBA, Volclay Type 1F Panel, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements.

Regulations

Page 3 of 8


1 Description1.1 Volclay Type 1F Panel, the membrane component of the Volclay Waterproofing System, comprises a fast hydrating waterproofing corrugated cardboard panel, 1220 mm square and 5 mm thick, with the flutes filled with dry granular sodium bentonite and sealed at the edges. The product is manufactured from a rapidly degrading cardboard (see Figure 1).

Figure 1 Cross-section through Volclay Type 1F Panel

recycled board covers

sealed edge

corrugated board core

Volclay sodium bentonite filling

1.2 Other components used with Volclay Type 1F Panel include:Waterstop RX — a black, extruded strip of sodium bentonite/butyl rubber backed with a silicone release paper and • used as a water bar in construction joints and in conjunction with Volclay Type 1F PanelBentoseal — a trowel-grade sodium bentonite compound used for detailing work, eg around penetrations• Voltex Granules — a loose form of granular sodium bentonite used to prevent the seepage of water from backfill • material or mixed with water and used as a paste for sealingVolclay Hydrobar Tubes — a water soluble polyvinyl alcohol tube, filled with natural sodium bentonite and sealed • at each end. It is used to seal constructions at the base of walls waterproofed with Volclay panels.


2 Delivery and site handling2.1 Volclay Type 1F Panels are 1220 mm square and 5 mm thick, each panel weighs approximately 8 kg. The panels are packed horizontally on pallets protected by cardboard wrapping and corner pieces. Each pallet carries 125 panels.




2.5 Volclay Hydrobar Tubes are approximately 610 mm long and 50 mm in diameter. The tubes are packaged in cartons. Each carton contains 16 tubes, each box weighs 25 kg.



The following is a summary of the assessment and technical investigations carried out on Volclay Type 1F Panel.

Page 4 of 8


3 Use3.1 Volclay Type 1F Panel is satisfactory for use in waterproofing and damp-proofing underground reinforced concrete structures and is satisfactory for Type A reinforced concrete basement construction grades 2, 3 and 4 as defined in Table 1 of BS 8102 : 1990.

3.2 The system stops the passage of water between the panel and the concrete structure to which it is fixed. The panel must be adequately confined to ensure a watertight seal is achieved in service.

3.3 Waterstop RX is satisfactory for use as a water bar in reinforced concrete construction joints, on Type B constructions as defined in Table 1 of BS 8102 : 1990. It is also used as an accessory in structures waterproofed with Volclay Type 1F Panel.




4.2 The panel is easy to handle and can be cut using a sharp knife.

4.3 Volclay Type 1F Panel may be applied under most normal site conditions, including subzero temperatures, but must not be installed during heavy rainfall.


5 Resistance to water and water vapour5.1 The system provides an effective barrier to the passage of liquid water and water vapour from the ground.

5.2 A single layer of the panels with lap joints, will provide an effective barrier to the passage of liquid water up to 1 bar. At higher pressures, a double layer of panels, with staggered joints, will be required.

6 Resistance to puncturingIf a dry panel is punctured, provided no bentonite is lost, it will self-heal when hydrated. If bentonite is lost, the waterproofing properties of the panel will be reduced. However, these properties can be restored by applying a layer of Bentoseal or a second layer of panels to the damaged area or by replacement of the damaged panel.


7.2 The panel is not affected by organic contaminants.

7.3 In chemically-contaminated areas either a double layer of panels is used or the panels are hydrated by deliberate soaking with mains water. In badly contaminated areas both techniques are used.

8 Resistance to loadingProvided the panel is adequately confined, properly hydrated and not subject to point loading, an installation beneath a foundation slab will transmit dead and imposed loads to the ground safely and without excessive deformation. In situations where point loading is anticipated the Certificate holder’s advice should be sought.

9 Resistance to substrate movementThe panels are not bonded to the substrate and can thus accommodate any likely structural movement in service, eg differential settlement or movement at joints.


11 DurabilityA fully-protected Volclay Type 1F Panel, when installed with the appropriate ancillary products, will provide an effective barrier to water and water vapour for the life of the building in which it is incorporated.

Page 5 of 8

Installation

12 General12.1 Surfaces to be waterproofed need not be clean and may be damp but must be free from cavities, projecting ribs and standing water.

12.2 Panels are cut as necessary to avoid pipes, conduits, ducts or other penetrations, but the continuity of the membrane is maintained by a 25 mm deep trowel application of Bentoseal.

12.3 At joints, Waterstop RX is included in the joint (see sections13.7 to 13.13) or a proprietary water bar and an extra layer of Volclay Type 1F panels is applied (see Figure 2).

Figure 2 Concrete wall plan — proprietary water bar

13 ProcedureVolclay Type 1F PanelVertical surfaces13.1 Cracks wider than 1 mm and discontinuities are sealed with Bentoseal. Volclay Type 1F panels are then fixed to the foundation wall using hard nails, or are retained in position with backfill. Panels are overlapped up to the marked margin and, at corners, panels are bent along the line of the flutes. Where cut across the flutes, panels are wetted along the cut to prevent sodium bentonite loss.

13.2 A second course of Volclay Type 1F panels is installed, overlapping the first, with the joints staggered. When panels are not used under the structure, Volclay Hydrobar Tubes are then laid at the base of the wall in accordance with the Certificate holder’s instructions (see Figure 3). Any discontinuities present in the membrane are sealed with a trowel application of Bentoseal.

Figure 3 Volclay Hydrobar Tube installation details

13.3 Normally, backfill is applied immediately. A bead of backfill is tamped over the Volclay Hydrobar Tube at the base and the backfill is applied and compacted to at least 85% Modified Proctor, to within 50 mm of the panels’ edge. Backfill must be well-graded, rounded material, not exceeding 50 mm and must be free from angular broken material; otherwise panels must be protected by boards. If backfill cannot be applied immediately, Type 1 panels are protected against rainfall by polythene sheet. Panels damaged mechanically or by wetting are replaced before backfilling.

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13.4 After backfilling, the application of Volclay Type 1F panels is continued. Panels must not be installed above the intended final ground level. The installation is completed with a flashing (or other technique).

Beneath the base of structures designed to resist hydrostatic pressure 13.5 The Volclay Type 1F Panel is not normally recommended for this application and should not be use without prior consultation with the Certificate holder.

On roofs of underground structures (tunnels, reservoirs, etc)13.6 Volclay Type 1F panels are overlapped, nailed in position, and covered with compacted earth, sand or gravel (maximum aggregate size 18 mm) with a minimum depth of 450 mm (if trafficking is not envisaged, a 300 mm depth of cover is adequate).



Installation

13.9 A strip of Waterstop RX is uncoiled and placed in position leaving the release paper temporarily intact so it can be pushed firmly in place into any undulations in the concrete surface (see Figure 4). Once sufficient product is positioned, the release paper is removed.



Waterstop RX





Swelling

13.12 If the material exhibits considerable swelling prior to confinement in the joint, it must be replaced with new material.

Concrete casting

13.13 Casting of retaining walls and floor slabs is carried out immediately after fixing Waterstop RX in position.

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14 InvestigationsVolclay Type 1F Panel14.1 A test was carried out to compare the rate of hydration of the Volclay Type 1F panel to the Types 1 and 1C panels.

14.2 An assessment was made of the physical properties of the panel.

14.3 An assessment was made of the durability of the Volclay Type 1F panel using relevant data on natural sodium bentonite waterproofing products.


Volclay Hydrobar Tubes 14.5 Volclay Hydrobar Tubes were included as part of a trial installation and rate of water penetration test conducted on Volclay panels.

Bibliography


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Documents

CETCO Europe Ltd Agrément Certificate 86/1650...Voltex Granules a loose form of granular sodium bentonite used to prevent the seepage of water from backfill material or mixed with