SR en 206-2014 - Concrete

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Document type: Document subtype: Document stage: Document language: E C:\Users\smithb\Desktop\NA_I S EN 206_2014_Rev 10_ 2014-11-25_Draft for public consultation.doc STD Version 2.5a

/TC Date: 2014-10

TC WI

/TC

Secretariat:

National Annex EN 206 Concrete - Specification, performance, production and conformity

ICS:

Descriptors:

Draft for public consultation. End Date : 2015-01-09

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Contents 1

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Annex NA (informative) National Annex to I.S. EN 206 ..................................................................................43

Introduction .........................................................................................................................................................44 NA.1 Classification (clause 4) ............................................................................................................................45 NA.1.1 Exposure classes related to environmental actions...........................................................................46 NA.1.2 Compressive strength classes (subclause 4.3.1) ...............................................................................47 NA.2 Requirements for concrete and methods of verification (clause 5) .....................................................68 NA.2.1 General (subclause 5.1.1) ......................................................................................................................69 NA.2.2 Cement (subclause 5.1.2) ......................................................................................................................610 NA.2.3 Aggregates (subclause 5.1.3) ................................................................................................................711 NA.2.4 Admixtures (subclause 5.1.5) ................................................................................................................712 NA.2.5 Basic requirements for composition of concrete - General (subclause 5.2.1) ................................713 NA.2.6 Resistance to alkali silica reaction (subclause 5.2.3.5 (1)) ................................................................814 NA.2.7 Use of additions (subclause 5.2.5)........................................................................................................815 NA.2.8 Chloride Content (subclause 5.2.8) ......................................................................................................916 NA.2.9 Concrete temperature (subclause 5.2.9) ..............................................................................................917 NA.2.10 Limiting values for concrete composition (subclause 5.3.2) ...........................................................918 NA.2.11 Performance related methods (subclause 5.3.3).............................................................................1019 NA.2.12 Cement content and water/cement ratio (subclause 5.4.2) ............................................................1020 NA.2.13 Strength General (subclause 5.5.1.1) ............................................................................................1021 NA.2.14 Compressive Strength (subclause 5.5.1.2) ......................................................................................1022 NA.3 Specification for concrete (clause 6) .....................................................................................................1323 NA.4 Delivery of fresh concrete (clause 7) .....................................................................................................1424 NA.4.1 Delivery ticket for ready-mixed concrete (subclause 7.3) ................................................................1425 NA.4.2 Transport of concrete - General ..........................................................................................................1526 NA.4.3 Transport to the point of delivery .......................................................................................................1527 NA.4.4 Time of transport ..................................................................................................................................1528 NA.4.5 Quantity of concrete .............................................................................................................................1529 NA.5 Conformity control and conformity criteria (clause 8) ........................................................................1530 NA.5.1 Sampling and testing plan (subclause 8.2.1.2 Table 17) ..................................................................1531 NA.5.2 Conformity for mean results (subclause 8.2.1.3.2 (12)) ....................................................................1532 NA.5.3 .Conformity criteria for properties other than strength (subclause 8.2.3.3) ..................................1533 NA.6 Production control (clause 9) .................................................................................................................1634 NA.6.1 Testing (subclause 9.4) ........................................................................................................................1635 NA.7 Annex B Identity testing ......................................................................................................................1636 NA.7.1 General ..................................................................................................................................................1637 NA.7.2 Identity criteria for compressive strength (Annex B.3) ....................................................................1638 NA.8 Annex D Additional requirements for specification and conformity of concrete for special 39

geotechnical works .............................................................................................................................1740 NA.8.1 Cement (Annex D.2.1(3)) ......................................................................................................................1741 NA.8.2 Water/cement ratio (Annex D, D.3.3) ..................................................................................................1742 NA.8.3 Fresh concrete (Annex D, D3.4) ..........................................................................................................1743

Annex NB (informative) Standardized prescribed mixes ............................................................................1844 Annex NC (informative) Alternative limiting values for varying minimum covers and cement 45

types/combinations .............................................................................................................................2246

Annex ND (informative) Forms for specifying or scheduling concrete mixes in accordance with 47 I.S. EN 206 .............................................................................................................................................2848

Annex NE ...........................................................................................................................................................3249


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Annex NF (informative) Conformity procedure for cement GGBS combinations in accordance 1 with I.S. EN 206 .................................................................................................................................... 342

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Annex NA 1 (informative) 2

3 National Annex to I.S. EN 206 4

Introduction 5

This National Annex serves to elaborate the requirements for concrete relevant to provisions valid in Ireland. 6

Where subclauses and tables in this National Annex directly relate to those in I.S. EN 206, the corresponding 7 numbers will be referenced. 8

Where the term "no additional guidance is provided" is used this is to identify that where I.S. EN 206 allows for 9 "provisions in the place of use" that this has been considered in the development of this national annex. 10

NA.1 Classification (clause 4) 11

NA.1.1 Exposure classes related to environmental actions 12

In Table 1 of I.S. EN 206 Exposure classes, class designation 6, Chemical attack, include as an informative 13 example in XA2 Sea Water. 14

NA.1.2 Compressive strength classes (subclause 4.3.1) 15

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Table NA.1 Compressive strength classes for normal weight and heavy weight concrete (Table 12) 1

Compressive strength classes Minimum characteristic cylinder strength

fck.cyl N/mm2

Minimum characteristic cube strength f ck.cube

N/mm 2

C8/10 C12/15 C16/20 C20/25 C25/30 C28/35 C30/37 C32/40 C35/45 C40/50 C45/55 C50/60 C53/65 C55/67 C57/70 C60/75 C65/80 C70/85 C75/90 C80/95 C90/105

C100/115

8 12 16 20 25 28 30 32 35 40 45 50 53 55 57 60 65 70 75 80 90

100

10 15 20 25 30 35 37 40 45 50 55 60 65 67 70 75 80 85 90 95 105 115

NOTE Table NA.1 has been amended to permit the use of the intermediate strength classes (i.e. C28/35, C32/40, C53/65, C57/70, C65/80 and C75/90) which are in current use as design strengths. Additionally C28/35 and C32/40 are used in the context of limiting values in Table NA.5, NA.6 and NA.7 for some exposure classifications.

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NA.2 Requirements for concrete and methods of verification (clause 5) 1

NA.2.1 General (subclause 5.1.1) 2

The specification and use of cements other than those cements given specific suitability in subclause NA.2.2 3 and additions given specific suitability in subclause NA.2.7, should be guided either by physical research 4 using these cements with Irish aggregates or by other (national) provisions valid in a place of use where 5 environmental exposure conditions and standards of workmanship are similar to those which prevail in 6 Ireland. 7

NA.2.2 Cement (subclause 5.1.2) 8

Specific suitability is established for cements of at least Class 42,5 in I.S. EN 197-1 as listed in Table NA.2, for 9 which additional advice is provided in subclause NA.2.7 in respect of combinations, and Table NA.3 of this 10 annex. 11

NOTE The term "combination" refers to the restricted range of Portland cements as listed in Table NA.2 and 12 "additions" as defined in subclause NA.2.7, which, having been combined in the concrete mixer, count towards the cement 13 content and water/cement ratio in concrete. 14

Sulfate resisting cements are now covered in I.S.EN 197-1, see the national foreword to that standard for 15 additional guidance. 16

Table NA.2 Cements for which specific suitability is established (and for use in combinations) 17

Designation in I.S. EN

197-1 Description

Composition (percentage by mass)

Main constituents Minor

additional constituents

Clinker Blastfurnace slag Fly Ash

(siliceous) Limestone Limestone

K S V L LL

CEM I Portland cement 95-100 0-5

CEM II/A-L Portland-limestone cement

80-94 6-20 0-5

CEM II/A-LL Portland-limestone cement

80-94 6-20 0-5

CEM II/A-S Portland-slag cement

80-94 6-20 0-5

CEM II/A-V Portland-fly ash cement

80-94 6-20 0-5

NOTE 1 See subclause NA.2.7 for advice on use of these cements with additions. NOTE 2 The slag content of the combination of a cement and addition must not exceed 70%.

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Table NA.3 Cements for which specific suitability is established 1

Designation in I.S. EN 197-1 Description

Composition (percentage by mass)

Main constituents Minor

additional constituents

Clinker Blast-furnace slag Fly Ash

(siliceous) Limestone

K S V L or LL

CEM II/B-S Portland-slag cement 65-79 21-35 0-5

CEM II/B-V Portland- fly ash cement 65-79 21-35 0-5

CEM II /A-M (S-L) or (S-LL)

Portland-composite cement 80-94 NOTE 1 NOTE 1 0-5

CEM II /A-M (S-V)


CEM II /A-M (V-L) or (V-LL)


CEM II /B-M (S-L) or (S-LL)


CEM II /B-M (S-V)


CEM II /B-M (V-L) or (V-LL)


CEM III/A Blastfurnace cement 35-64 36-65 0-5

CEM III/B Blastfurnace cement 20-34 66-80 0-5

NOTE 1 The total percentage of the two main constituents other than clinker will lie in the range 6% - 20%.

NOTE 2 The total percentage of the two main constituents other than clinker will lie in the range 21% - 35%.

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NA.2.3 Aggregates (subclause 5.1.3) 3

The subject of recycled aggregate is referred to in subclause 5.1.3(2) and 5.2.3.4 and Annex E and their 4 suitability for use in Ireland has yet to be established. Use of such aggregates should be by agreement of the 5 parties involved on a project by project basis 6

NOTE A flakiness index of Fl50 is recommended for flakiness for both natural normal weight and heavyweight 7 aggregates and for air cooled blast furnace slag and for coarse recycled aggregates (Tables E.1 and E.3) 8

NA.2.4 Admixtures (subclause 5.1.5) 9

No additional guidance provided. 10

NA.2.5 Basic requirements for composition of concrete - General (subclause 5.2.1) 11

Annex A of I.S. EN 206 provides details for initial testing to establish a concrete that satisfies all specified 12 requirements for fresh and hardened concrete. 13


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Where not limited by the specification, established suitability for particular specified environmental conditions 1 should be clearly established by the producer in selecting particular constituents from those for which general 2 suitability is established. 3

NOTE Details of standardized prescribed mixes are given in subclause NA.3.1. 4

NA.2.6 Resistance to alkali silica reaction (subclause 5.2.3.5 (1)) 5

For concrete used in Ireland refer to IEI/ICS report Alkali-Silica Reaction: General Recommendations and 6 Guidance in the Specification of Building and Civil Engineering Works 2002. 7

NA.2.7 Use of additions (subclause 5.2.5) 8

NA.2.7.1 General 9

Cements and Type II additions noted herein, when combined in the concrete mixer, count towards cement 10 content and water/cement ratio in concrete. 11

The Standard permits 3 concepts for the use of additions (k-value, ECPC and EPCC) which have equal 12 status. This National Annex provides rules of application for concepts where there is experience of use in 13 Ireland with specific additions. 14

NA.2.7.2 K value concept for fly ash (subclause 5.2.5.2.2) 15

For use with CEM I, CEM II/A-L (LL) and CEM II/A-V cements and Categories A or B fly ash the maximum 16 amount of fly ash to be taken into account shall meet the requirement: 17

Fly ash/cement 0,33 by mass. 18

For use with CEM I, CEM II/A-L (LL) and CEM II/A-V cements and Category C fly ash the maximum amount of 19 fly ash to be taken into account shall meet the requirement: 20

Fly ash/cement < 0,20 by mass. 21

This modifies the rule given in Clause 5.2.5.2.2 (3) (as permitted under Clause 5.2.5.1 (4)) The total mass 22 fraction includes all fly ash in addition and in cement, if applicable. 23

NA.2.7.3 K value for ground granulated blastfurnace slag conforming to I.S.EN 15167-1 (5.2.5.2.4) 24

There is no experience to date of the use of the k-value concept for ground granulated blastfurnace slag 25 (GGBS) in Ireland and no provisions are given in this document. Additional guidance on the concept is 26 presented in CEN TR 16639. 27

NA.2.7.4 Principles of the equivalent concrete performance concept (subclause 5.2.5.3) 28

Reference concrete in conformity with the requirements of relevant exposure classes have yet to be 29 established for Irish concrete practice. Thus no provisions are given in this document. 30

NA.2.7.5 Principles of the equivalent performance of combinations concept (5.2.5.4) 31

Specific suitability is established for the use of GGBS conforming to I.S. EN 15167-1 with CEM I, CEM II/A-L 32 (LL), CEM II/A-S or CEM II/A-V, up to a limit of 70 % by weight, expressed as: total GGBS / (Cement + 33 GGBS), provided that strength performance of the combination is demonstrated to be at least a class 42,5 N 34 cement in accordance with Annex NE. 35

The total slag content of the combination of cement and GGBS must not exceed 70 %; in this regard, NOTE 3 36 in Table NA.6 in respect of XF durability classes contains further advice. 37


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The assessment of concretes produced with CEM I and CEM II/A with GGBS, up to a limit of 70%, in respect 1 of strength and durability comparison has been determined nationally. This has been completed to date with 2 concretes produced using identified cement types for the relevant exposure classes. This assessment has not 3 been made for other additions with other cements, nor for multiple additions. 4

NA.2.8 Chloride Content (subclause 5.2.8) 5

For concrete applications in Ireland the maximum chloride content classes selected from Table 15 of 6 I.S. EN 206 are as established in Table NA.4. 7

Table NA.4 Maximum chloride content of concrete (Table 15) 8

Concrete Use Chloride content Class Max. Cl content by mass of cement a,b

Not containing steel reinforcement or other embedded metal with the exception of corrosion-resisting lifting devices

Cl 1,0 1,0 %

Containing steel reinforcement or other embedded metal Cl 0,40 0,40 %

Containing prestressing steel reinforcement Cl 0,10 0,10 %

a Where type II additions are used and are taken into account for the cement content, the chloride content is expressed as the percentage chloride ion by mass of cement plus the total mass of additions that are taken into account. b Cement type CEM III and GGBS as a type II addition may contain more than 0,10 % chloride but in that case the maximum chloride content shall be stated on the packaging and/or delivery note. c In the case of SR cements the maximum chloride content by mass of cement shall be 0,20 % with a chloride class of Cl 0,20

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NA.2.9 Concrete temperature (subclause 5.2.9) 10

The temperature of fresh concrete at the time of delivery shall not exceed 30 C, unless any other value is 11 specified or permitted by the specifier. 12

NA.2.10 Limiting values for concrete composition (subclause 5.3.2) 13

Due to the lack of experience on how the classification of the environmental actions on concrete reflect local 14 differences in the same nominal exposure class, the specific values of these requirements for the applicable 15 exposure classes are given in the provisions valid in the place of use. Thus provisions valid in the place of 16 use are permitted to give a set of specific values based on local experience, which differ from place to place. 17 Annex F presents a common framework for presenting the limiting values and the specific values contained 18 therein are informative only and do not reflect any agreed set of limiting values by the CEN/TC104 committee. 19

In respect of Ireland tables of recommended limiting values for composition of concrete used in Ireland are 20 given in Tables NA.5, NA.6 and NA.7 (these replaces the Table F1 given in Annex F, which is not valid in 21 Ireland). These recommendations relate to concrete using the range of cements and combinations referred to 22 in subclauses NA.2.2 and NA.2.7 of this annex, for which specific suitability is established. Refer to 23 subclauses NA.2.1 and NA.2.7 for guidance on the use of other cements and combinations. The required 24 minimum cover to reinforcement is that published in I.S. EN 1992-1-1 (Eurocode 2 - Design of Concrete 25 Structures Part 1-1: General rules and rules for buildings). 26

Further guidance in relation to concrete composition for concrete subject to chemical attack from ground 27 conditions is given in BRE Special Digest 1:2005. 28


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NA.2.11 Performance related methods (subclause 5.3.3) 1

Guidance on performance-related design is under development (SR CEN TR 16563). Performance-related 2 design methods have not been widely used in Ireland and no provisions are given in this document. 3

NA.2.12 Cement content and water/cement ratio (subclause 5.4.2) 4

Unless specified, the test methods and criteria for the use of fine lightweight aggregate (referred to in NOTE 1, 5 I.S. EN 206) should be agreed between the producer and the specifier. 6

NA.2.13 Strength General (subclause 5.5.1.1) 7

In assessing strength using 100 mm moulded cube specimens a direct 1:1 relationship may be used up to cube 8 compressive strengths of 60 N/mm2 for concrete with maximum aggregate size of 20 mm, provided a 9 relationship has been established through testing or previous use. 10

NA.2.14 Compressive Strength (subclause 5.5.1.2) 11

Assessing the strength in the structure or structural component should be based on I.S. EN 13791.12


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Table NA.5 Recommended limiting values for composition and properties of concrete (Table F.1)

Exposure classes

No risk of corrosion or attack

Carbonation-induced corrosion Chloride-induced corrosion Freeze/thaw attack Aggressive chemical environments

Sea water Chloride Other than sea water

X 0 XC 1 XC 2 XC 3 XC 4 XS 1 XS 2 XS 3 XD 1 XD 2 XD 3 XF 1 XF 2 XF 3 XF 4 XA 1 XA 2 XA 3

Minimum cover

Cmin

15 25 25 30 35 40 45 35 40 45 - - - - - -

Maximum

w/c ratio

--- 0,65 0,60 0,55 0,55 0,50 0,50 0,45 0,55 0,50 0,45 See Table NA.6 for recommended limiting values for XF classes

See Table NA.7 for recommended limiting values for XA classes

Minimum strength

Class

C12/15 C25/30 C28/35 C30/37 C30/37 C35/45 C35/45 C40/50 C30/37 C35/45 C40/50

Minimum cement content

kg/m3

--- 270 290 310 310 360 360 400 310 360 400

NOTE 1 These recommendations are for the cements and combinations listed in subclauses NA.2.2 and NA.2.7 of this National Annex. In XS, XD classes when GGBS > 35 % and Fly Ash > 20%, lower minimum strength classes can be used, see table NC.1 to table NC.6. Limiting values for alternative covers are also given in table NC.1 to table NC.6.

NOTE 2 The minimum cover to reinforcement in XC classes should be increased by 5 mm in concretes where the GGBS content exceeds 50%.

NOTE 3 The values in Table NA.5 are based on the assumption of an intended working life of at least 50 years under the anticipated maintenance conditions. For advice on longer service life in Exposure Classes XC, XS and XD, see Annex NC.

NOTE 4 For definition of minimum cover Cmin , see I.S. EN 1992-1-1, subclause 4.4.1. NOTE that nominal cover cnom = cmin + cdev.

NOTE 5 The recommendations in respect of Exposure Classes XA relate to aggressive conditions defined in Table 2 of I.S. EN 206. For combinations of aggressive chemicals see guidance in Table 2. Further guidance for aggressive chemicals and complex site conditions, is contained in BRE Special Digest 1.


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Table NA.6 Recommended limiting values for freeze thaw exposure classes

Exposure Class Min. Strength Class Max. W/C Ratio Min. air content and

min. cement content for 20 mm max aggregate

size (see NOTE 1)

XF1 C25/30 0,60

3,5

290

C30/37 0,55 -

310

XF2 C30/37 0,55

3,5

310

C35/45 0,50 -

360

XF3 C30/37 0,55

3,5

310

C40/50 0,45 -

400

XF4 C32/40

0,50 3,5

340

C40/50 0,45 -

400 NOTE 1 For different aggregate sizes, the minimum air content recommended is: 3,0 % for 40 mm; 4,5 % for 14 mm; 5,5 % for 10 mm. In addition, the minimum cement contents may need to be adjusted.

NOTE 2 All cements and combinations (see subclauses NA.2.2 and 2.7) may be used, but for the wearing surface of concrete pavements, cements or combinations containing more than 50 % GGBS or more than 31 % pfa may not be suitable due to the possibility of surface scaling.

NOTE 3 These recommended concretes are suitable for design lives of both "at least 50 years" and "at least 100 years". However pavements and hard standings are often designed with a shorter intended working life than "at least 50 years".

NOTE 4 See also I.S. EN 12620 and SR 16 in respect of aggregates.


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Table NA.7 Recommended limiting values for aggressive chemical environments exposure classes (NOTES 4, 5)

Exposure Class

Min. Strength Class

Max. W/C Ratio

Min. cement content

Cement Type

XA1 C32/40 0,50 340 CEM I, CEM II/A-L,LL, CEM II/A-V, CEM II/A-S Combination of CEM I,CEM II/A-L, LL, CEM II/A-V or CEM II/A-S with up to 49 % total GGBS content

C30/37 0,55 320 Combination of CEM I, CEM II/A-L,LL, CEM II/A-V or CEM II/A-S with (50 70) % total GGBS content SRPC, CEM II/B-V, CEM III/A (see NOTE 1), CEM III/B

XA2 C35/45 (see NOTE 2)

0,50 360 CEM I, CEM II/A-L, LL, CEM II/A-V, CEM II/A-S, Combination of CEM I, CEM II/A_L, LL, CEM II/A-V or CEM II/A-S with up to 65 % total GGBS content CEM II/B-V, CEM III/A

C30/37 (see NOTE 3)

0,50 340 Combination of CEM I, CEM II/A-L, LL, CEM II/A-V, or CEM II/A-S with (66 70) % total GGBS content SRPC, CEM III/B

XA3 C40/50 (see NOTE 2)

0,45 400 CEM I, CEM II/A-L, LL, CEM II/A-V, CEM II/A-S, Combination of CEM I, CEM II/A-L, LL, CEM II/A-V or CEM II/A-S with up to 65 % total GGBS content CEM II/B-V, CEM III/A

C32/40 (see NOTE 3)

0,45 360 Combination of CEM I, CEM II/A-L, LL, CEM II/A-V or CEM II/A-S with (66 70) % total GGBS content. SRPC, CEM III/B

NOTE 1 With the additional requirement for a minimum of 50 % GGBS in the CEM III/A cement. NOTE 2 If SO42- > 1400 mg/l (groundwater) use only the lower rows of either XA2 or XA3 exposure classes as appropriate. NOTE 3 For these cement types a lower minimum strength class is permitted to reflect lower strength development at 28 days. NOTE 4 For combinations, where the alumina content of the GGBS exceeds 14 %, the C3A content of the CEM I or CEM II/A fraction shall not exceed 10 %. NOTE 5 The values in this Table are based on the assumption of an intended working life of at least 50 years under the anticipated maintenance conditions.

NA.3 Specification for concrete (clause 6)

NA.3.1 Specification of standardized prescribed concrete (subclause 6.4.)

The mix for standardized prescribed concrete is selected from the restricted range given in National Annex NB and is to be used with Exposure Class X0 only (applies to concrete with reinforcement or embedded metal in very dry conditions only or to concrete without reinforcement or embedded metal in all exposure conditions except where there is freeze/thaw, abrasion or chemical attack).


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The assessment of the mix proportions forms an essential part of the compliance requirements. Strength testing is not used to assess compliance.

These mixes have been developed to give assurance that generally they will produce concrete of the required characteristic strength except where there is poor control of production or where poor materials are used. Where strength is important a designed mix should be specified. Early strength gain of ST concretes with CEM III/A will require special consideration in cold weather conditions.

Standardized prescribed mixes are applicable for site batching of concrete for housing and similar construction. They should be specified only where the scale of work or economy does not justify the applications of mix design procedures or to enable work to start where there is insufficient time for the collection of data to support mix design proposals.

Details of standardized prescribed mixes are in Annex NB of this National Annex.

NA.4 Delivery of fresh concrete (clause 7)

NA.4.1 Delivery ticket for ready-mixed concrete (subclause 7.3)

By agreement with the specifier, the additional information given in subclause 7.3 of I.S. EN 206 for designed and prescribed concrete may be given on a product data sheet and not on each delivery ticket provided the delivery ticket clearly identifies the concrete reference code used on the product data sheet.

In the case of proprietary concrete, the delivery ticket shall contain the proprietary name of the concrete.

Before discharging the concrete, the producer shall provide the user with a delivery ticket for each load or batch of standardized prescribed concrete that contains:

reference of the production plant;

serial number of ticket;

date and time of loading i.e. time when all materials enter the mixer/truck;

truck number;

name of purchaser, if relevant;

name and location of site;

specified standardized prescribed concrete;

specified consistence class;

chloride class, if specified;

maximum nominal upper aggregate size;

any additional specified requirements;

declaration of conformity with reference to the specification, and this standard;

name or mark of the certification body, if relevant.


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NA.4.2 Transport of concrete - General

Concrete shall be transported from the mixer to the point of delivery as rapidly as practicable by methods that will maintain the required consistence and will minimise segregation, prevent loss of any constituents or ingress of foreign matter or water.

NA.4.3 Transport to the point of delivery

Concrete shall be transported in a truck mixer or agitator unless the specifier agrees to the use of non-agitating vehicles. Where non-agitating vehicles are used, the fresh concrete shall be protected from gain or loss of water.

NA.4.4 Time of transport

Where transported in truck mixers or agitators, concrete shall be delivered within 2 hours after the time of loading or within 1 hour after the time of loading when non-agitating equipment is used unless a shorter time is specified or a longer time is permitted by the specifier.

NOTE A longer time after loading may be appropriate in cool, humid weather or where GGBS, PFA or retarding admixtures have been used, but a shorter time may be essential in hot weather with cement rich concretes, where accelerating admixtures have been used.

NA.4.5 Quantity of concrete

The basis of supply shall be by the cubic metre of fresh, fully compacted concrete. The volume of a given batch shall be calculated from the total mass of the batch divided by the mass per cubic metre of fresh, fully compacted concrete determined in accordance I.S. EN 12350-6 for concrete of normal consistence and BS 1881: Part 129 for semi-dry concrete.

The total mass of the batch shall be either the sum of the masses of all the materials used including water or be determined from the gross and tare weights of the vehicle on a weighbridge.

NA.5 Conformity control and conformity criteria (clause 8)

NA.5.1 Sampling and testing plan (subclause 8.2.1.2 Table 17)

National guidance regarding Note d of Table 1. A day in which 25 m3 or more of designed concrete has been produced or, on days when less than 25 m3 of designed concrete has been produced, the day on which a cumulative 25 m3 has been produced shall be regarded as one production day. The sequence is re-started on a new date for each occasion when a production day is counted.

NA.5.2 Conformity for mean results (subclause 8.2.1.3.2 (12))

No additional guidance provided.

NA.5.3.Conformity criteria for properties other than strength (subclause 8.2.3.3)

The reactive alkali content per cubic metre of concrete shall be calculated from the declared mix proportions or from those obtained from observation of the batching or from examination of the autographic records of the batching.

The calculation of the reactive alkali content shall be based on the summation of the certified average alkali contents of each of the constituent materials (refer to IEI/ICS report Alkali-Silica Reaction: General Recommendations and Guidance in the Specification of Building and Civil Engineering Works 2002).

The calculated alkali content of the concrete shall not exceed the permitted content in the IEI/ICS Report.


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NA.6 Production control (clause 9)

NA.6.1 Testing (subclause 9.4)

Sampling and testing shall be carried out by competent personnel.

NA.7 Annex B Identity testing

NA.7.1 General

Sampling and testing shall be carried out by competent personnel.

NA.7.2 Identity criteria for compressive strength (Annex B.3)

NA.7.2.1 Identity testing for slump and air content

For identity testing of ready-mixed concrete supplied to the construction, the point and time of sampling shall be at delivery into the construction site unless agreed otherwise.

NOTE Samples taken for identity testing of ready-mixed concrete may be used for identity testing of concrete as supplied to the construction when either:

concrete is discharged from the producers vehicle directly into the construction; or effects due to time delays, or ambient conditions, transport and handling between discharge from the producers vehicle and delivery into the construction are agreed with the producer to be minimal; or adjustments to specified values have been agreed with the producer to take account of significant effect as under item b). Such adjustments may be nominal or based on trials.

Similarly, samples taken at the point of production of the concrete, whether ready-mixed or factory precast, may be used for identity testing of concrete supplied to the construction.

NA.7.2.2 Slump testing

NA.7.2.2.1 Sampling

The sampling may either;

be in accordance with I.S. EN 12350-1, or

if concrete is delivered in a truck mixer or agitating equipment, the slump may be measured using a spot sample obtained from the initial discharge. The spot sample shall be taken after a discharge of approximately 0,3 m3 by taking six increments from the moving stream of the concrete in accordance with I.S. EN 12350-1. Remix the sample on a non-absorbent surface and test for slump in accordance with I.S. EN 12350-2.

NA.7.2.2.2 Method of test

The slump shall be measured in accordance with I.S. EN 12350-2.

NA.7.2.3 Identity criteria for the slump of an individual batch (Annex B, B.4)

Table NA.8 is presented in tabular form in order to provide clarification on the interpretation of Table 21


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Table NA.8 Identity criteria for slump

For samples taken in accordance withI.S. EN 12350-1

For spot samples taken from initial discharge

Specified slump class Not less than mm

Not more than mm

Not less than mm

Not more than mm

S1 0 50 0 60

S2 40 100 30 110

S3 90 160 80 170

S4 150 220 140 230

S5 210 No requirement 200 No requirement

Specified target slump mm

Not more than the following from the specified target value mm

< 40 -20 +20 -30 +30

50 to 90 -30 +30 -40 +40

>100 -40 +40 -50 +50

NA.7.2.4 Air content

NA.7.2.4.1 Sampling

The sample shall be a composite sample taken in accordance with I.S. EN 12350-1.

NA.7.2.4.2 Method of test

The air content shall be measured in accordance with I.S. EN 12350-7 for normal and heavyweight concretes and in accordance ASTM C 173 for lightweight concrete.

NA.7.2.4.3 Identity criteria for air content of an individual batch

No test result shall be more 0,5% below the specified minimum air content or more than 5% above the minimum air content.

NA.8 Annex D Additional requirements for specification and conformity of concrete for special geotechnical works

NA.8.1 Cement (Annex D.2.1(3))

CEM II/A-L is approved for use.

NA.8.2 Water/cement ratio (Annex D, D.3.3)

In case of temporary works the specified maximum water- cement ratio may not apply.

NA.8.3 Fresh concrete (Annex D, D3.4)

No additional guidance provided.


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Annex NB (informative)

Standardized prescribed mixes

NB.1 Standardized prescribed mixes

The mix shall be selected from Table NB.1or Table NB.2. The materials must be selected from those given in Table NB.3. The assessment of the mix proportions shall form an essential part of the compliance requirements.

Alternatively if concrete is supplied by a third party accredited supplier Table NB.2 applies.

The selected mix is to be used with Exposure Class X0 only (applies to concrete with reinforcement or embedded metal in very dry conditions only or to concrete without reinforcement or embedded metal in all exposure conditions except where there is freeze/thaw, abrasion or chemical attack).

The purchaser shall provide the producer with all pertinent information on the use of the concrete and the specified requirements.


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Table NB.1 standardized prescribed mixes and related strengths

Standard mix

Constituent Nominal maximum size of aggregate Characteristic compressive cube strength at 28 days assumed for structural design

20 mm 40 mm N/mm2

Slump S1, S2

Slump S3

Slump S1, S2

Slump S3

ST1 Cement (kg) Total aggregate (kg)

210 1940

230 1880

180 2010

200 1950

7,5


240 1920

260 1860

210 1980

230 1920

10,0


270 1890

300 1820

240 1950

260 1900

15,0


300 1860

330 1800

280 1920

300 1860

20,0

ST1 ST2 ST3

Fine aggregate (percentage by mass of total aggregate)

35 to 45 35 to 45 35 to 45 35 to 45

Standard mix

Constituent Nominal maximum size of aggregate

20 mm 40 mm

Slump S1, S2

Slump S3

Slump S1, S2

Slump S3

ST4


Grading Limit CP MP FP


35 to 45 30 to 40 25 to 35


35 to 45 30 to 40 25 to 35

NOTE 1 The cement contents together with the total masses of saturated surface dry aggregates and added water will produce approximately one cubic metre of concrete. The values given are based on typical values of the relative densities of cement and aggregates. For some aggregates having higher or lower relative densities, adjustments may be required to the quantity of aggregates to produce this volume of concrete having the required workability and cement content.

NOTE 2 The values given for aggregate content, may be adjusted to allow also for the characteristics of the aggregates as described in I.S. EN 12620.

NOTE 3 The aggregates for mixes ST1, ST2 and ST3 may be batched by volume.


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Table NB.2 Alternative equivalent design mix

Standard prescribed mix

Alternative equivalent mix if supplied from a third party

accredited readymix concrete supplier. N/mm2

ST1 ST2 ST3 ST4

C12/15 C12/15 C12/15 C16/20

NB.1.1 Selection of mix and materials

The purchaser shall ensure that the required quality of concrete for both strength and durability can be obtained when using the restricted range of materials and mixes listed in Tables NB.1, NB.2 and NB.3.

The mix proportions for standardized prescribed mixes given in Table NB.1 will be assumed to provide concrete having the characteristic strengths given in the table.

The equivalent design mixes in Table NB.3 may be used as alternatives to the corresponding standard prescribed (ST) mix designation.

NB.2 Constituent materials

The materials used shall be selected from Table NB.2 as appropriate.

The only admixtures permitted in standard mixes are normal water-reducing admixture.

The purchaser shall be responsible for indicating to the producer any restrictions in the permitted options.


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Table NB.3 Materials for use in standardized prescribed mixes

Cement/aggregate Standardized prescribed mixes

ST1, ST2, ST3 ST4

Cement and additions CEM I N CEM I R CEM I /SR Cements CEM II/A-L,LL CEM II/A-V CEM III/A Others

I.S. EN 197-1 I.S. EN 197-1 I.S. EN 197-1 I.S. EN 197-1 I.S. EN 197-1 I.S. EN 197-1

I.S. EN 197-1

I.S. EN 197-1

Coarse aggregates

Fine aggregate

All-in aggregate

I.S. EN 12620

I.S. EN 12620

I.S. EN 12620

I.S. EN 12620

I.S. EN 12620

Not allowed

NOTE 1 Early strength gain of ST concretes with CEM III/A will require special consideration in cold weather conditions.

NOTE 2 For key to abbreviations see Table ND.1 .

The producer shall comply with the requirements to minimise the risk of ASR associated with the selection of materials or mix proportions.

The chloride limits in the concrete shall as given in Table NA.4.


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Annex NC (informative)

Alternative limiting values for varying minimum covers and cement types/combinations

Table NC.1 (XC) 50 year design life

50 year design life Cement Type Corresponding GGBS % for

mixer addition

Corresponding PFA % for

mixer addition Minimum

cover Cmin 15 20 25 30 35 40 45 50 55 60

XC1 C25/30 0,65 270

Cements and combinations except where the GGBS content exceeds 50 %

N/A C25/30 0,65 270

Cements and combinations where the GGBS content exceeds 50 %

XC2 N/A C32/40 0,50 340

C28/35 0,60 290

C25/30 0,65 270

All cements and combinations except where the GGBS content exceeds 50 %

N/A N/A C32/40 0,50 340

C28/35 0,60 290

C25/30 0,65 270


XC3 N/A C35/45 0,50 360

C30/37 0,55 310

C28/35 0,60 290

C25/30 0,65 270


N/A N/A C35/45 0,50 360

C30/37 0,55 310

C28/35 0,60 290

C25/30 0,65 270


XC4 N/A C40/50 0,45 400

C35/45 0,50 360

C30/37 0,55 310

C28/35 0,60 290

C25/30 0,65 270


N/A N/A C40/50 0,45 400

C35/45 0,50 360

C30/37 0,55 310

C28/35 0,60 290

C25/30 0,65 270


NOTE 1 For definition of minimum cover Cmin, see I.S. EN 1992-1-1, subclause 4.4.1. NOTE that nominal cover cnom = cmin + cdev. Designers should consider whether the above minimum cover values when used for prestressed steel are to be adjusted by an additional factor of c dur .

NOTE 2 Trade-offs of cover against strength are permissible for the various cement types and combinations, as indicated. The bold values are the default limiting values from the current Table NA.5 in I.S. EN 206. In each box, the maximum water cement ratio and minimum cement contents (in kg/m3) are given, together with a grade of concrete which will be deemed to satisfy this durability requirement for that particular cement type.


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Table NC.2 (XS) 50 year design life

50 year design life

Cement Type Corresponding GGBS % for

mixer addition %


mixer addition % Minimum

cover Cmin 15 20 25 30 35 40 45 50 55 60

XS1

N/A N/A N/A C40/50 0,45 400

C35/45 0,50 360

C32/40 0,50 360

C30/37 0,55 310

All cements in Tables NA.2 and NA.3

35 6 20

N/A N/A N/A C35/45 0,45 400

C32/40 0,50 360

C30/37 0,50 360

C28/35 0,55 310

CEM III/A,CEM II/B-V 36 65 21 -35

N/A N/A N/A C32/40 0,45 400

C30/37 0,50 360

C28/35 0,50 360

C28/35 0,55 310

CEM III/B 66 - 70

XS2

N/A N/A N/A C45/55 0,40 420

C40/50 0,45 400

C35/45 0,50 360

C32/40 0,50 340


35 6 20

N/A N/A N/A C40/50 0,40 420

C35/45 0,45 400

C32/40 0,50 360

C30/37 0,50 340

CEM III/A,CEM II/B-V 36 65 21 -35

N/A N/A N/A C35/45 0,40 420

C32/40 0,45 400

C30/37 0,50 360

C28/35 0,50 340

CEM III/B 66 - 70

XS3

N/A N/A N/A N/A C50/60 0,40 440

C45/55 0,40 420

C40/50 0,45 400

C35/45 0,50 360


35 6 20

N/A N/A N/A N/A C45/55 0,40 440

C40/50 0,40 420

C35/45 0,45 400

C32/40 0,50 360

CEM III/A, CEM II/B-V 36 65 21 -35

N/A N/A N/A N/A C40/50 0,40 440

C35/45 0,40 420

C32/40 0,45 400

C30/37 0,50 360

CEM III/B 66 - 70

NOTE 1 For definition of minimum cover Cmin, see I.S. EN 1992-1-1, subclause 4.4.1. NOTE that nominal cover cnom = cmin + cdev. Designers should consider whether the above minimum cover values when used for prestressed steel are to be adjusted by an additional factor of c dur . NOTE 2 Trade-offs of cover against strength are permissible for the various cement types and combinations, as indicated. The bold values are the default limiting values from the current Table NA.5 in I.S. EN 206. In each box, the maximum water cement ratio and minimum cement contents (in kg/m3) are given, together with a grade of concrete which will be deemed to satisfy this durability requirement for that particular cement type. NOTE 3 For any given cover, while lower compressive strength classes are specified for concrete mixes using CEM III/A, CEM III/B, CEM II/B-V cements or equivalent combinations, the strength class equal to that for mixes using CEM I or CEM II/A cement types can be specified at a later age (56 days), since concrete mixes using the former cements will give increased strength gain beyond 28 days (compared to the latter cement types).


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Table NC.3 (XD) 50 year design life

50 year design life

Cement Type Corresponding GGBS % for

mixer addition %


mixer addition % Minimum

cover Cmin 15 20 25 30 35 40 45 50 55 60

XD1

N/A N/A C40/50 0,45 400

C35/45 0,50 360

C30/37 0,55 310

C28/35 0,60 290


35 6 20

N/A N/A C35/45 0,45 400

C32/40 0,50 360

C28/35 0,55 310

C25/30 0,60 290


N/A N/A C32/40 0,45 400

C30/37 0,50 360

C25/30 0,55 310

C25/30 0,60 290

CEM III/B 66 - 70

XD2

N/A N/A N/A C45/55 0,40 420

C40/50 0,45 400

C35/45 0,50 360

C30/37 0,55 310


35 6- 20

N/A N/A N/A C40/50 0,40 420

C35/45 0,45 400

C32/40 0,50 360

C28/35 0,55 310


N/A N/A N/A C35/45 0,40 420

C32/40 0,45 400

C30/37 0,50 360

C25/30 0,55 310

CEM III/B 66 - 70

XD3

N/A N/A N/A N/A C50/60 0,40 440

C45/55 0,40 420

C40/50 0,45 400

C35/45 0,50 360


35 6 20

N/A N/A N/A N/A C45/55 0,40 440

C40/50 0,40 420

C35/45 0,45 400

C32/40 0,50 360

CEM III/A, CEM II/B-V 36 - 65 21 -35

N/A N/A N/A N/A C40/50 0,40 440

C35/45 0,40 420

C32/40 0,45 400

C30/37 0,50 360

CEM III/B 66 70

NOTE 1 For definition of minimum cover Cmin, see I.S. EN 1992-1-1, subclause 4.4.1. NOTE that nominal cover cnom = cmin + cdev. Designers should consider whether the above minimum cover values when used for prestressed steel are to be adjusted by an additional factor of c dur . NOTE 2 Trade-offs of cover against strength are permissible for the various cement types and combinations, as indicated. The bold values are the default limiting values from the current Table NA.5 in I.S. EN 206. In each box, the maximum water cement ratio and minimum cement contents (in kg/m3) are given, together with a grade of concrete which will be deemed to satisfy this durability requirement for that particular cement type. NOTE 3 For any given cover, while lower compressive strength classes are specified for concrete mixes using CEM III/A, CEM III/B, CEM II/B-V cements or equivalent combinations, the strength class equal to that for mixes using CEM I or CEM II/A cement types can be specified at a later age (56 days), since concrete mixes using the former cements will give increased strength gain beyond 28 days (compared to the latter cement types).


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Table NC.4 (XC) 100 year design life

100 year design life Cement Type Corresponding GGBS % for mixer addition

Corresponding PFA % for mixer addition

Minimum cover Cmin

25 30 35 40 45 50 55 60

XC1

C25/30

0,65 270

Cements and combinations except where the GGBS content exceeds 50%

N/A C25/30

0,65 270

Cements and combinations where the GGBS content exceeds 50%

XC2

C35/45 0,50 360

C32/40 0,50 340

C28/35 0,60 290

C25/30 0,65 270

All cements and combinations except where the GGBS content exceeds 50%

N/A C35/45 0,50 360 C32/40

0,50 340 C28/35

0,60 290 C25/30

0,65 270 Cements and combinations where the GGBS content exceeds 50%

XC3

C45/55 0,40 420

C35/45 0,50 360

C30/37 0,55 310

C28/35 0,55 310

C25/30 0,65 270


N/A C45/55 0,40 420 C35/45 0,50 360

C30/37 0,55 310

C28/35 0,55 310

C25/30 0,65 270


XC4

C50/60 3 0,40 440

C45/55 0,40 420

C35/45 0,50 360

C30/37 0,55 310

C28/35 0,55 310

C25/30 0,65 270


N/A C50/603

0,40 440 C45/55 0,40 420

C35/45 0,50 360

C30/37 0,55 310

C28/35 0,55 310

C25/30 0,65 270


NOTE 1 For definition of minimum cover Cmin, see I.S. EN 1992-1-1, subclause 4.4.1. NOTE that nominal cover cnom = cmin + cdev. Designers should consider whether the above minimum cover values when used for prestressed steel are to be adjusted by an additional factor of c dur .


NOTE 3 These limiting criteria only apply in cases of pre stressed precast concrete


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Table NC.5 (XS) 100 year design life

100 year design life

Cement Type

Corresponding GGBS % for

mixer addition%


mixer addition %

Minimum cover Cmin 25 30 35 40 45 50 55 60

XS1

N/A N/A C45/55 0,40 420 C40/50 0,45 400

C35/45 0,50 360

C32/40 0,50 340

All cements in Tables NA.2 and NA.3 35 6 20

N/A N/A C40/50 0,40 420 C35/45 0,45 400

C32/40 0,50 360

C30/37 0,50 340 CEM III/A, CEM II/B-V 36 65 21 -35

N/A N/A C35/45 0,40 420 C32/40 0,45 400

C30/37 0,50 360

C28/35 0,50 340 CEM III/B 66 - 70

XS2

N/A N/A N/A C50/60 0,40 440 C45/55 0,40 420

C35/45 0,50 360

C32/40 0,50 340


N/A N/A N/A C45/55 0,40 440 C40/50 0,40 420

C32/40 0,50 360


N/A N/A N/A C40/50 0,40 440 C35/45 0,40 420

C30/37 0,50 360

C28/35 0,50 340 CEM III/B 66 - 70

XS3

N/A N/A N/A N/A C50/60 0,40 440 C45/55 0,40 420

C40/50 0,45 400


N/A N/A N/A N/A C45/55 0,40 440 C40/50 0,40 420


N/A N/A N/A N/A C40/50 0,40 440 C35/45 0,40 420

C32/40 0,45 400 CEM III/B 66 - 70

NOTE 1 For definition of minimum cover Cmin, see I.S. EN 1992-1-1, subclause 4.4.1. NOTE that nominal cover cnom = cmin + cdev. Designers should consider whether the above minimum cover values when used for prestressed steel are to be adjusted by an additional factor of c dur


NOTE 3 For any given cover, while lower compressive strength classes are specified for concrete mixes using CEM III/A, CEM III/B, CEM II/B-V cements or equivalent combinations, the strength class equal to that for mixes using CEM I or CEM II/A cement types can be specified at a later age (56 days), since concrete mixes using the former cements will give increased strength gain beyond 28 days (compared to the latter cement types).


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Table NC.6 (XD) 100 year design life

100 year design life Cement Type

Corresponding GGBS % for

mixer addition%


mixer addition %

Minimum cover Cmin 25 30 35 40 45 50 55 60

XD1

N/A N/A C45/55 0,40 420 C35/45 0,50 360

C30/37 0,55 310


N/A N/A C40/50 0,40 420 C32/40 0,50 360


N/A N/A C35/45 0,40 420 C30/37 0,50 360

C28/35 0,55 310 CEM III/B 66 - 70

XD2

N/A N/A N/A C50/60 0,40 440 C45/55 0,40 420

C35/45 0,50 360

C32/40 0,50 340


N/A N/A N/A C45/55 0,40 440 C40/50 0,40 420

C32/40 0,50 360


N/A N/A N/A C40/50 0,40 440 C35/45 0,40 420

C30/37 0,50 360

C28/35 0,50 340 CEM III/B 66 - 70

XD3

N/A N/A N/A N/A C50/60

0,40 440 C45/55 0,40 420

C40/50 0,45 400



0,40 440 C40/50 0,40 420



0,40 440 C35/45 0,40 420

C32/40 0,45 400 CEM III/B 66 - 70

NOTE 1 For definition of minimum cover Cmin, see I.S. EN 1992-1-1, subclause 4.4.1. NOTE that nominal cover cnom = cmin + cdev. Designers should consider whether the above minimum cover values when used for prestressed steel are to be adjusted by an additional factor of c dur . NOTE 2 Trade-offs of cover against strength are permissible for the various cement types and combinations, as indicated. The bold values are the default limiting values from the current Table NA.5 in I.S. EN 206-1. In each box, the maximum water cement ratio and minimum cement contents (in kg/m3) are given, together with a grade of concrete which will be deemed to satisfy this durability requirement for that particular cement type. NOTE 3 For any given cover, while lower compressive strength classes are specified for concrete mixes using CEM III/A, CEM III/B, CEM II/B-V cements or equivalent combinations, the strength class equal to that for mixes using CEM I or CEM II/A cement types can be specified at a later age (56 days), since concrete mixes using the former cements will give increased strength gain beyond 28 days (compared to the latter cement types).


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Annex ND (informative)

Forms for specifying or scheduling concrete mixes in accordance with

I.S. EN 206

ND.1 Use of forms: General

Form A should be used when specifying designed mixes, Form B when specifying prescribed mixes and Form C when specifying standardized prescribed mixes. These forms may be freely copied from this National Annex.

ND.1.1 Abbreviations

The following abbreviations are used in the forms for cements and additions to which specific suitability has been established (subclauses NA.2.2 and NA.2.7).

For abbreviations of other cements see Table 1 of I.S. EN 197-1.

Table ND.1 Abbreviations

Abbreviation Cement designation

CEM I N CEM I Class 42,5 N (Normal Portland) to I.S. EN 197-1

CEM I R CEM I Class 42,5 R (Rapid Hardening Portland) to I.S. EN 197-1

CEM I/SR CEM I/SR to I.S. EN 197-1

CEM II/A-L (or A-LL) CEM II Class 42,5 N (Portland-limestone) to I.S. EN 197-1

CEM II/A-V CEM II Class 42,5 N (Portland-fly ash) to I.S. EN 197-1

CEM II/B-V CEM II Class 42,5 N (Portland-fly ash) to I.S. EN 197-1

CEM II/A-S CEM II Class 42,5 N (Portland-slag) to I.S. EN 197-1

CEM II/B-S CEM II Class 42,5 N (Portland-slag) to I.S. EN 197-1

CEM II /A-M (S-L) CEM II Class 42,5 N (Portland-composite cement) to I.S. EN 197-1

CEM II /A-M (S-V) CEM II Class 42,5 N (Portland-composite cement) to I.S. EN 197-1

CEM II /A-M (V-L) CEM II Class 42,5 N (Portland-composite cement) to I.S. EN 197-1

CEM II /B-M (S-L) CEM II Class 42,5 N (Portland-composite cement) to I.S. EN 197-1

CEM II /B-M (S-V) CEM II Class 42,5 N (Portland-composite cement) to I.S. EN 197-1

CEM II /B-M (V-L) CEM II Class 42,5 N (Portland-composite cement) to I.S. EN 197-1

CEM III/A CEM III Class 42,5 N (Blastfurnace cement) to I.S. EN 197-1

CEM III/B CEM III Class 42,5 N (Blastfurnace cement) to I.S. EN 197-1


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Table ND.2 Type II Additions

Abbreviation Type ll Addition

PFA Fly Ash to I.S. EN 450-1

GGBS Ground Granulated Blastfurnace Slag to I.S. EN 15167-1


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ND.2 Form A Schedule for the specification requirements of designed mixes

Form A Schedule for the specification requirements of designed

These mixes below shall be supplied as designed mixes in accordance with the relevant clauses of I.S. EN 206

1. Mix reference

2. Strength class

3. Nominal maximum size of aggregate, in mm (D)

4. Types of aggregate Coarse Other (specify requirements) Fine Other (specify requirements)

I.S. EN 12620 I.S. EN 12620

5. Cement type(s) complying with: (delete as appropriate) (Select from Tables NA.2 and NA.3. For key to abbreviations see Table ND.1)

CEM I N CEM I R CEM I/SR CEM II/A-L (or A-LL) CEM II/A-V CEM II/B-V CEM II/A-S CEM II/B-S CEM II /A-M (S-L) CEM II /A-M (S-V) CEM II /A-M (V-L) CEM II /B-M (S-L) CEM II /B-M (S-V) CEM II /B-M (V-L) CEM III/A CEM III/B

6. Additions complying with: (delete as appropriate) (Refer to subclause NA.2.7. See Table ND.1 for key to abbreviations)

PFA GGBS

7. Sulfate class, if applicable (delete as appropriate) XA 1 / 200 - 600 SO42- XA 2 / 600 - 1400 SO42- XA 2 / 1400 - 3000 SO42- XA 3 / 3000 - 6000 SO42-

8. Exposure Class (as in I.S. EN 206-1) (or combinations)

X0 XC1, XC2, XC3, XC4 XS1, XS2, XS3 XD1, XD2, XD3 XF1, XF2, XF3, XF4 XA1, XA2, XA3


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9. Chloride Class Cl 1,0 Cl 0,40 Cl 0,20 Cl 0,10

10, Minimum cement content, kg/m3

11. Maximum free water / cement ratio

12. Quality assurance requirements

13. Rate of sampling intended by the purchaser for strength testing (for information)

14. Other requirements (alkali, etc. as appropriate)

In the case of fresh concrete the following shall be completed by the purchaser.

15. Consistence (Choose one method) Slump Class Compaction Class Flow Class

S1, S2, S3, S4, S5 C0, C1, C2, C3 F1, F2, F3, F4, F5, F6

16. Method of placing (for information)

17. Other requirements by the purchaser of fresh concrete (only if appropriate)

ND.3Form B Schedule for the specification requirements of prescribed mixes


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Annex NE

These mixes below shall be supplied as prescribed mixes in accordance with the relevant clauses of I.S. EN 206-1

1. Mix reference

2. Cement type(s) or combinations (Select from Tables NA.2 and NA.3)

3. Nominal maximum size of aggregate, in mm

4. Types of aggregate Coarse Other (specify requirements) Fine Other (specify requirements)

I.S. EN 12620 I.S. EN 12620

5. Mix Proportions Cement, kg Type II addition, kg Fine aggregate, kg Coarse aggregate, kg Admixtures Other

6. Consistence (choose one method), delete as appropriate Slump Class Compaction Class Flow Class

S1, S2, S3, S4, S5 C0, C1, C2, C3 F1, F2, F3, F4, F5, F6


8. Method of compliance and rate of sampling (for information)

9. Other requirements (e.g. maximum chloride content, alkali, etc. as appropriate)


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NE.1 Form C Schedule for the specification requirements of standardized prescribed mixes

These mixes below shall be supplied as standardized prescribed mixes in accordance with the relevant clauses of I.S. EN 206-1

1. Standard mix

(ring those required)

ST1 ST2 ST3 ST4

2. Class of concrete (for information) (ring one)

Unreinforced Unreinforced Reinforced

Unreinforced Reinforced

Unreinforced Reinforced

3. Cement type(s) or combinations complying with (ring those permitted) CEM I N I.S. EN 197-1 CEM I R I.S. EN 197-1 CEM I/SR I.S. EN 197-1 CEM II/A-L, LL I.S. EN 197-1 CEM II/A-V I.S. EN 197-1 CEM III/A I.S. EN 197-1 Others

CEM I N CEM I R CEM I/SR CEMII/A-L, LL CEM II/A-V CEM III/A




4. Types of aggregate Coarse (ring those permitted) Fine All-in (ST1, ST2, ST3 only)

I.S EN 12620 I.S. EN 12620

I.S. EN 12620 I.S. EN 12620

I.S. EN 12620 I.S. EN 12620

I.S. EN 12620 I.S. EN 12620

5. Admixture (if required normal water-reducing admixture only) Normal water-reducing admixture (ring as appropriate)

YES / NO

YES / NO

YES / NO

YES / NO

6. Consistence Slump class (ring one) (to be completed by the purchaser of the fresh concrete)

S1 S2 S3

S1 S2 S3

S2 S3

S2 S3


8. Other requirements (only if appropriate)


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Annex NF (informative)

Conformity procedure for cement GGBS combinations in accordance

with I.S. EN 206

Introduction This annex sets out a procedure for establishing the suitability of a range of combinations of a specific cement of the strength class 42.5 with a specific GGBS, which can count towards limiting values.

Specific suitability has been established for the combination of a certified GGBS and CEM I, CEM II/A-L (LL), CEM II/A-S, CEM II/A-V cement up to a total replacement level of 70 % GGBS, where the GGBS content of CEM II/A-S shall count towards this total replacement level of 70 % GGBS.

I.S. EN 206-1 may place further restrictions on the proportion of GGBS depending on the exposure class in which the concrete is to be used.

This annex meets the requirements for establishing suitability for the use of GGBS in concrete conforming to I.S. EN 206-1.

NF.1 General

The procedure shall be used only for combinations of cements of standard strength class 42.5 certified to I.S. EN 197-1 with GGBS conforming to I.S. EN 15167-1.

The procedure applies to proportions of GGBS to cement up to 70 % GGBS, and determines a pass/fail on the basis of a particular combination meeting the strength requirements in Table NE.1.

Table NE.1 Requirements for the compressive strength of combinations

Combination Lower Strength Limit

Early Strength 20 N/mm2

Standard Strength 42,5 N/mm2

50 % GGBS 7 Days 28 Days

70 % GGBS 7 Days 56 Days

NOTE The standard strength of a 70 % GGBS replacement combination is tested at 56 days due to its recognised slower strength development to 28 days and continued strength development thereafter.

NF.2 Procedure

NF.2.1 Sampling

Monthly bulk average samples of each cement source are obtained from the material supplier. A composite sample of GGBS is obtained by blending not less than eight spot samples of similar mass, taken at regular intervals throughout the month. These cement and GGBS samples are combined at 50 % and 70 % GGBS replacement levels.


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NF.2.2 Testing

The monthly combined samples are tested for early and standard strength in accordance with I.S. EN 196-1 at 7, 28 and 56 days, as noted in Table NE.1. These test results are termed monthly averages.

NF.2.3 Assessment

NE.2.3.1 The monthly averages for early and standard strength are compared to the lower strength limit requirements in Table NE.1.

NE.2.3.2 The running mean of not less than six months and not more than one year of the monthly averages are compared to the lower limit strength requirements in Table NE.1 plus the statistical margin. The statistical margin added to the lower limits shall be +3 N/mm2 for early strength limits and +5 N/mm2 for standard strength (28 or 56 day) limits.

NF.2.4 Conformity

On meeting the minimum strength criteria, a combination is said to be a permitted proportion in combination with cements of the strength class of 42.5. If a permitted proportion is established, combinations of lesser proportions of GGBS are also permitted proportions.

NF.3 Issue of certificates

Certificates of conformity to this annex are to be issued. The certificates shall contain the following information:

1. the source of certified GGBS to be tested as a combination;

2. the source of cement to be tested as a combination;

3. the means by which samples of the GGBS and cement were obtained;

4. the month represented by the latest samples;

5. details of the permitted proportions which conform to the requirements of this annex;

6. the signature of the person responsible for the testing.


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Bibliography

SR 16, Guidance on the use of I.S. EN 13242:2002 - Aggregates for unbound and hydraulically bound materials for use in civil engineering work and road construction

I.S. EN 1992-1-1, Eurocode 2: Design of concrete structures - Part 1-1: General rules and rules for buildings.

BS 1881: Part 129, Testing concrete - Method for determination of density of partially compacted semi dry fresh concrete.

IEI/ICS report Alkali-Silica Reaction: General Recommendations and Guidance in the Specification of Building and Civil Engineering Works 2002

BRE Special Digest 1:2005, Concrete in aggressive ground.


Documents

SR en 206-2014 - Concrete