Infrastructure Services Department

ISM007 SPECIFICATION

CONCRETE PATHWAY SPECIFICATION As walking, cycling and the use of mobility scooters are now recognised as an integral part of our transport system, we have focused our attention on the design, construction and quality of our pathways. This specification has been drawn up to encourage usage and meet the expectations of the community by improving the quality, safety and look of pathways throughout the City of Greater Geraldton. Key outcomes are that pathways meet the desire lines of the user, flow well for the cyclist, provide comfort in the form of smooth, shady surfaces and are well defined and pleasing to the eye.

1 GENERAL The road verge levels shall be constructed to the approved cross-section of 2% positive grade from the top of the existing kerb. The City of Greater Geraldton pathways will be either constructed 500mm away from the back of the kerb (to meet Regional Bicycle Network Specifications) or constructed adjoining the back of the existing kerb.

The pathways are generally between 2.0m to 3.0m wide, typically 2.5m and 100mm to 150mm thick unreinforced grey concrete.

2 LAYOUT Shared pathways widths and locations within the road reserve are specified in accordance with the City of Greater Geraldton’s Bike Plan. The pathway layout shall be shown on the attached detailed plans, sections, details (including locations for tactile pavers) and location plans (please refer to FP110).

3 SET-OUT The contractor is to set out all lines and levels for the pathway as directed by the Superintendent or as supplied approved drawings. It is the responsibility of the contractor to verify all dimensions and too accurately and securely position all formwork for the pathway construction.

Pathway levels will be as specified on-site or as per the approved construction drawings. The pathway is to be constructed with a 2% cross-fall to the top of the kerb, unless otherwise specified. Where the contractor finds the site congestion reduces the curved horizontal radii to below 10m, the pathway layout must be discussed with the Superintendent.

4 EXCAVATION The contractor will be responsible for all excavations of the pathway bed to give a minimum of 100mm and a maximum of 120mm depth of concrete pavement, laid on a minimum of 50mm depth of clean sand.

Prior to commencing any works, the contractor shall be responsible to obtain all relevant information concerning the location of any existing overhead or underground services

City of Greater Geraldton CONCRETE PATHWAY SPECIFICATION Version 1 – May 2015

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which may be affected by the works. Please contact Dial Before You Dig on 1100 or www.1100.com.au. All care shall be taken not to disturb any bench marks, survey or level pegs.

4.1 Excavation Width

Excavate no more than 0.5m wider on each side than the proposed pathway, ie. a 2.5m pathway would require an excavation width of no greater than 3.5m.

4.2 Kerbing and Bitumen All existing kerbing, pathways, crossovers etc. requiring removal will be removed by the contractor.

4.3 Reticulation

Where properties have a reticulated sprinkler system, which conflicts with the new pathway alignment, it shall be removed and replaced adjacent to the new pathway by the City of Greater Geraldton. Any removal and replacement of reticulation will need to be booked in advance by the contractor to allow for the scheduling by the Principal to accommodate the existing budget program.

4.4 Compaction

All excavation shall be thoroughly consolidated with a vibrating plate compactor or similar after moistening and shall be inspected and approved prior to any concrete being placed.

Where in in-situ soil materials is, in the opinion of the Superintendent, not suitable for use as a base for the concrete structure, extra excavation will take place to allow for a minimum thickness of 50mm of clean sand to be placed. This thickness may vary depending on the characteristics and expected performance of the in-situ material. Imported sand is to meet the satisfaction of the Superintendent and may be charged at the schedule rates.

4.5 Service Lids and Street Furniture

Service Lids within the alignment may need to be adjusted to meet design levels of the pathway or replaced if deemed necessary by the Superintendent. The contractor shall carry out these works at the scheduled hourly rate. The City of Greater Geraldton will supply any required drainage products to be fitted by the contractor.

Non-regulatory signage that requires removal during works must be replaced prior to completion of the job, all other regulatory signage is to be relocated by the Superintendent and not under any circumstances removed from the site. Any removal and replacement of regulatory signage will need to be booked in advanced by the contractor to allow for scheduling by the Principal to accommodate the existing budget program.

5 FORMWORK REQUIREMENTS Formwork shall be provided in accordance with AS3610: Formwork for Concrete, to produce hardened concrete to the lines, levels and shapes shown on the drawings or

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specified elsewhere. It shall have adequate strength to carry all applied loads, including the pressure of fresh concrete, vibration loads, weight of workers and equipment, without loss of shape. Forms shall be mortar tight and designed to allow removal without risk or damage to the completed structure. Joints in the formwork shall be perpendicular to the main axis of the shape of the concrete.

6 CONCRETE All pathways are to be constructed with grey concrete unless otherwise stated. The cylinder compressive strength on a 28-day test must be at least 25 MPa for grey concrete and the maximum aggregate size of 14mm with a slump of 50-80mm. All concrete supplied shall conform to AS1379: Specification and Supply of Concrete. Any variation to the specifications will need to be approved by the principal.

Contractors are to satisfy the City, that reliable and consistent supply of mix can be maintained in accordance with AS1379 and that a system is in place to ensure consistent slump is provided between loads to the site.

6.1 Placing Concrete

The base shall be thoroughly and evenly compacted and then evenly moistened with water (not saturated) immediately prior to placing of the concrete.

Concrete shall be evenly placed to a minimum depth of 100mm and shovelled into position continuously and spaded especially at all edges to give maximum density. No break in operations shall be permitted from time of placing concrete to finishing except as authorised by the Superintendent.

When crossovers to properties are to be constructed the depth and width shall be as per the City of Greater Geraldton’s Crossover Specifications. Pram ramps shall be constructed as shown of City’s plans or as directed by the Superintendent.

No concrete will be placed prior to an inspection and approvals by the Superintendent and notice of inspection is required to be given by 3:00pm on the day preceding the concrete pour, unless other prior arrangements are made.

6.2 Finishing Concrete

The concrete is to be bull-floated, trowelled and Roller finished right up to the joints and edges of the pathway. Joints are NOT edged with an edging tool. Concrete must be flush with top of the joints rubber cap. A course roller finish shall provide a non-slip, dense surface free of any depressions, float marks, jointing marks, honeycomb sections, or accumulation of fine dusty accretions liable to cause excessive surface wear.

The final surface finish shall be to the entire satisfaction of the Superintendent who shall reserve the right to require the removal of, or the correction of any surface deficiencies or finish.

City of Greater Geraldton CONCRETE PATHWAY SPECIFICATION Version 1 – May 2015

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7 JOINTS 7.1 Contraction Joints

The City uses a proprietary interlocking contraction joint system, call Lock Joint, to improve bike ride comfort and reduce vertical movement between concrete panels. Spacing’s are a maximum of 2 times the width of the pathway. However, where Lock Joint is being installed on materials other than sand, the spacing must be reduced to a maximum of 1.5 times the width of the pathway (see Lock Joint Specifications for correct application of the system).

Lock Joint must be positioned to correctly match the finished concrete height. Concrete must be firmly shovelled around Lock Joint to fill all voids and maximise interlock. All jointing materials are to be supplied by the contractor.

Lock Joint system instructions (attached) must be adhered to.

7.2 Expansion Joints

An expansion joint should be placed every 50m in a straight, unhindered path or at the start of a deviation or a side entry pit in the pathway. This is done more as a precautionary measure, as the expected expansion of the concrete panels should be accommodated by the space (at either side of the Lock Joint piece) created by the natural shrinkage of the concrete panel. Construction of full depth of the concrete with a 12mm thick approved proprietary expansion material is required.

7.3 Isolation Joints

Isolation joints are to be constructed to expansion joint specifications. Isolation joints are to be placed around all pre-existing structures including crossovers, sewer, Telstra and similar type manholes and any other obstacles that may be in the way or need to be adjusted in the future.

Power and light poles etc. are to have a square section of expansion at 500mm radius from the object to allow for removal if required.

The following materials are approved for joints;

Dimet – Jointex

Non Porite – Bitumen impregnated canite by the cold solvent process

Expandite – Flexcell or equal and approved

8 CURING OF THE CONCRETE Control of the curing if the concrete shall be carried out in a manner to ensure that shrinkage cracking does not occur. This may require the use of waterproof paper, polythene sheeting or a liquid membrane compound, which complies with ASTM Standard Specifications (C309-74).

9 TREATMENT AT CROSSOVERS Where a pathway meets an existing crossover it shall continue through the crossover at 150mm thick to provide good continuity to the pathway user. The contractor is expected to adjust the adjacent panels/materials to meet crossover design specifications.

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A site meeting between the contractor and Superintendent prior to commencement of the works will identify crossovers where this practice is unsuitable or unnecessary in which case the pathway should then abut the driveway as per drawing (please refer to FP110).

10 PRAM RAMPS The contractor is to form pram ramps as per drawing (please refer to FP110); this shows the pram ramps standard and supplies a layout. Pram ramps are to be formed without a lip to give a smooth ride for wheelchairs, prams and bicycles.

11 REINSTATEMENT 11.1 Backfill to Pathway

The contractor will be responsible for backfilling all disturbed surfaces. Backfill material is to be loam except for pathways constructed within the coastal reserve where localised sand is to be used (materials are to be specified by the Principal on each project).

11.2 Kerbing and Bituminous Surfaces Reinstatement to kerbing, concrete paving or bituminous road surfaces damaged or disturbed during the course of the work will be the responsibility of the Contractor.

11.3 Grass

The City of Greater Geraldton will be responsible for all reinstatement of grass. All vehicles are to access the worksites as directed by the Superintendent.

12 POLYMER CEMENT SPRAY COATING When this is required, the contractor is to provide spray on concrete textures using high strength polymer cement coating to new and existing works.

13 SERVICES It will be the responsibility of the contractor to ascertain what underground servicers are present and to contact the relevant authorities (Western Power, Telstra, Water Corporation, etc.) if necessary for a location prior to excavation. The cost (if any) of these locations are to the responsibility of the contactor.

14 MAINTENANCE CLAUSE There will be a twelve month maintenance period, with the period commencing from the day of inspection of the completed pathway.

15 TESTING The contractor shall, if required, supply the City with concrete batch details of the pathway as supplied by the concrete supplier, showing mix details, slump and compressive strength details.

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16 ITEMS NOT COVERED IN THIS SPECIFICATION Should there be any items of work or administrative elements not covered by this specification that the appropriate section of the City of Greater Geraldton’s Land Development Specifications (latest revision) shall prevail.

A copy of the City of Greater Geraldton’s Land Development Specifications can be found on the City’s website www.cgg.wa.gov.au.

PROJECT/DRAWING

NUMBER:

SCALE:

DRAWING

TITLE:

P

REVISION

NUMBER:

FILE LOC:

O:\CI\IPD\LAND DEVELOPMENT\LAND DEVELOPMENT

SPECIFICATIONS\Drawings\DWG Files\FP110 - Concrete

Shared Path.dwg

PROJECT

TITLE:

DATUM:

H

V

H

V

SURVEYED

BY:

DATE

SURVEYED:

PRAM RAMP

EXPANSION JOINT

AT RAMP

LOCK JOINT SPACING:

2X WIDTH OF PATH

EXPANSION JOINT

WHERE 2 PATHS MEET

EXPANSION JOINT

AT DEVIATIONS

10

0 m

m

min

10

0 m

m

min

LOCK JOINT TO BE

FLUSH WITH TOP

OF CONCRETE

FIBRE BOARD OR

EQUIVALENT BITUMEN

IMPREGNATED

CONTRACTION JOINT

CROSS SECTION

EXPANSION JOINT

CROSS SECTION

JOINT CROSS SECTIONS

CONCRETE PATH TYPICAL JOINTS LAYOUT

FP-110/1

CONCRETE SHARED PATH

STANDARD DRAWING

N.T.S

NA

NA

PAPER SIZE:

A3

NO. DATE DESCRIPTION

AM

EN

DM

EN

TS

BY APPR.

PROPOSED OR EXISTING KERB

JOINTS

NOTES

1. ALL WORK TO COMPLY WITH THE CITY OF GREATER

GERALDTON LAND DEVELOPMENT SPECIFICATION,

STANDARD DRAWINGS, & CONCRETE SHARED PATHWAY

SPECIFICATION (ISM007).

2. ALL DIMENSIONS ARE IN METERS UNLESS SHOWN

OTHERWISE.

3. USE DIMENSIONS ON PLANS, DO NOT SCALE.

4. ALIGNMENTS ARE INDICATIVE ONLY, REFER TO PROJECT

CONSTRUCTION DRAWINGS FOR PROPOSED PATH

LOCATIONS.

5. EXPANSION JOINTS SHALL BE PROVIDED WHERE THE PATH

ABUTS EXISTING CROSSOVERS.

6. EXPANSION JOINTS IN KERB AND PATHWAY MUST ALIGN

WHERE BOTH ARE PRESENT.

7. BLACK TACTILES SHALL BE USED ON GREY CONCRETE

PATHS. WHITE TACTILES SHALL BE USED ON BLACK

ASPHALT SURFACES. TACTILES INSTALLED ON ANY OTHER

SURFACES SHALL BE OF A SHADE THAT CONTRASTS WITH

THAT SURFACE, IN A WAY THAT IS NOTICEABLE TO

COLOURBLIND PEOPLE.

8. SPRAYCRETE SHALL BE INSTALLED IN ACCORDANCE WITH

THE MANUFACTURER'S SPECIFICATIONS. SPRAYCRETE

SHALL BE RED, WITH A STRETCHER BOND PATTERN.

9. PATH WIDTHS SHALL COMPLY WITH COUNCIL'S ROAD AND

SHARED PATHWAY HIERARCHY.

10. SHARED PATHWAYS SHALL GENERALLY BE DESIGNED IN

ACCORDANCE WITH AUSTROADS GUIDE TO ROAD DESIGN

PART 6A: PEDESTRIAN AND CYCLIST PATHS. ANY VARIATION

FROM THIS GUIDE SHALL BE REFERRED TO COUNCIL.

11. THE CONTRACTOR/CONSULTANT SHALL OBTAIN ALL

RELATED INFORMATION FROM "DIAL BEFORE YOU DIG"

BEFORE COMMENCING ANY DESIGN OR CONSTRUCTION

WORK AND ENSURE ANY POTENTIAL CLASHES ARE

ADEQUATELY DEALT WITH.

12. CONCRETE TO HAVE MINIMUM COMPRESSIVE STRENGTH

OF 25 MPa WITH LIGHT GREY COLOUR. ALL OTHER

COLOURED AND AESTHETIC CONCRETE TO BE 32 MPa

UNLESS OTHERWISE APPROVED BY CGG.

13. CONCRETE FINISH TO BE A NON-SLIP SURFACE.

14. EDGE/SIDES OF CONCRETE SHALL BE BACKFILLED AFTER 7

DAYS TO ALLOW FOR PROPER CURING. NO VEHICULAR

MOVEMENT OVER CONCRETE TO BE ALLOWED WITHIN THIS

PERIOD.

PROJECT/DRAWING

NUMBER:

SCALE:

DRAWING

TITLE:

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NUMBER:

FILE LOC:

O:\CI\IPD\LAND DEVELOPMENT\LAND DEVELOPMENT

SPECIFICATIONS\Drawings\DWG Files\FP110 - Concrete

Shared Path.dwg

PROJECT

TITLE:

DATUM:

H

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H

V

SURVEYED

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DATE

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2%

2.5 M

IN

CLE

AR

AN

CE

E

NV

ELO

PE

LOCAL AND DISTRICT DISTRIBUTOR

ROAD TYPICAL CROSS SECTION

FP-110/2

CONCRETE SHARED PATH

STANDARD DRAWING

N.T.S

NA

NA

PAPER SIZE:

A3

0.5 0.5

3.0 CLEARANCE ENVELOPE

2.0 PATH WIDTH

2.5 WIDTH

2.5 CLEARANCE ENVELOPE

2.0 WIDTH

2.5 M

IN

CLE

AR

AN

CE

E

NV

ELO

PE

KERB

0.5

ACCESS STREET

TYPICAL CROSS SECTION

NO. DATE DESCRIPTION

AM

EN

DM

EN

TS

BY APPR.

2%

SECTIONS

MINIMUM 50mm THICK FREE DRAINING SAND BASE

ON COMPACTED SUBGRADE TO 95% MDD

PLASTIC SHEETING OVERLAY

REQUIRED FOR CLAY SUBGRADE

MINIMUM 50mm THICK FREE DRAINING

SAND BASE

ON COMPACTED SUBGRADE TO 95% MDD

PLASTIC SHEETING OVERLAY

REQUIRED FOR CLAY SUBGRADE

SIGNS CAN BE LOCATED IN THIS AREA,

PROVIDED SPRAYCRETE STENCILLING IS

WIDENED TO ACCOMODATE SIGN

SPRAYCRETE

STENCILLED

PAVING

KERB

ALL SIGNAGE TO BE LOCATED

OUTSIDE CLEARANCE ENVELOPE

TYPICAL PROFILE ALONG

PRAM RAMP

MATCH TO ASPHALT OR USE TEMPORARY

ASPHALT FILL, EDGE MUST BE

0-10mm ABOVE ASPHALT SURFACE

1.5 MAX 2.0

12.5

%

MA

X

PROJECT/DRAWING

NUMBER:

FP-110/3

SCALE:

DRAWING

TITLE:

P

CONCRETE SHARED PATH

STANDARD DRAWING

LOCAL AND DISTRICT DISTRIBUTOR ROAD

CONCRETE PATH LAYOUT

REVISION

NUMBER:

FILE LOC:

O:\CI\IPD\LAND DEVELOPMENT\LAND DEVELOPMENT

SPECIFICATIONS\Drawings\DWG Files\FP110 - Concrete

Shared Path.dwg

PROJECT

TITLE:

N.T.S

DATUM:

H

V

H

V

SURVEYED

BY:

DATE

SURVEYED:

NA

NA

LOCAL AND DISTRICT DISTRIBUTOR

TYPICAL INTERSECTION LAYOUT

PAPER SIZE:

A3

NO. DATE DESCRIPTION

AM

EN

DM

EN

TS

BY APPR.

PROPERTY BOUNDARY

SPLAY TO BE PROVIDED AS PER COUNCIL GUIDELINES

1.0

1.0

2.0

0.3 MAX

STENCIL PAVING ON CONCRETE

REFER TO

DETAIL A

REFER TO

DETAIL B

DETAIL B

DETAIL A

1.01.0 2.0

0.3

VE

RG

E W

ID

TH

V

AR

IE

SV

ER

GE

W

ID

TH

V

AR

IE

S

2.5

2.5

DRAWING AND AS 1742

REFER TO APPROVED PROJECT

TYPICAL REFUGE SHOWN

JOINT INTERVAL NOT MORE THAN 5m UNLESS

OTHERWISE APPROVED BY CITY OF GREATER GERALDTON

KERB JOINT & PATH JOINT MUST ALIGN

1.5 MAX

RADIUS 10 MINIMUM

TACTILE STRIP

IN ACCORDANCE WITH AS 1428

PROJECT/DRAWING

NUMBER:

FP-110/4

SCALE:

DRAWING

TITLE:

P

CONCRETE SHARED PATH

STANDARD DRAWING

ACCESS STREET

CONCRETE PATH LAYOUT

REVISION

NUMBER:

FILE LOC:

O:\CI\IPD\LAND DEVELOPMENT\LAND DEVELOPMENT

SPECIFICATIONS\Drawings\DWG Files\FP110 - Concrete

Shared Path.dwg

PROJECT

TITLE:

N.T.S

DATUM:

H

V

H

V

SURVEYED

BY:

DATE

SURVEYED:

NA

NA

1.0

1.0

2.0

DETAIL BDETAIL A

ACCESS STREET TYPICAL

INTERSECTION LAYOUT

PAPER SIZE:

A3

STENCIL PAVING ON CONCRETE

NO. DATE DESCRIPTION

AM

EN

DM

EN

TS

BY APPR.

PROPERTY BOUNDARY

SPLAY TO BE PROVIDED AS PER COUNCIL GUIDELINES

1.5 MAX

1.01.0 2.0

2.0

VE

RG

E W

ID

TH

V

AR

IE

S

2.0

VE

RG

E W

ID

TH

V

AR

IE

S

REFER TO

DETAIL A

REFER TO

DETAIL B

0.3

0.3 MAX

JOINT INTERVAL NOT MORE THAN 5m UNLESS

OTHERWISE APPROVED BY CITY OF GREATER GERALDTON

TACTILE STRIP

IN ACCORDANCE WITH AS 1428

KERB JOINT & PATH JOINT MUST ALIGN

RADIUS 10 MINIMUM

PROJECT/DRAWING

NUMBER:

FP-110/5

SCALE:

DRAWING

TITLE:

P

CONCRETE SHARED PATH

STANDARD DRAWING

TYPICAL DETAILS

REVISION

NUMBER:

FILE LOC:

O:\CI\IPD\LAND DEVELOPMENT\LAND DEVELOPMENT

SPECIFICATIONS\Drawings\DWG Files\FP110 - Concrete

Shared Path.dwg

PROJECT

TITLE:

N.T.S

DATUM:

H

V

H

V

SURVEYED

BY:

DATE

SURVEYED:

NA

NA

PAPER SIZE:

A3

NO. DATE DESCRIPTION

AM

EN

DM

EN

TS

BY APPR.

TYPICAL TREATMENT

AROUND SIDE ENTRY PIT

TYPICAL TREATMENT

AROUND POWER POLE &

LIGHT POLE

TYPICAL TREATMENT

AROUND SIGN

COMPRESSIBLE MATERIAL

OR ASPHALT (SEE DETAIL)

COMPRESSIBLE MATERIAL

OR SLEEVE AROUND POLE

0.5m

0.5

m

POWER & LIGHT POLE

TREATMENT DETAIL

SQUARE SECTION AND

JOINT REQUIRED FOR

FOOTPATH

REINSTATEMENT

AND AROUND OLD POLE

INFRASTRUCTURE

RADIUS 10 MINIMUM

Installation

SpacingLock Joint Australia recommends spacings for Lock Joint joints to be a maximum of 1.5 times the width of a path. For example, a path 2m wide should have spacings no more than 3m. However, where Lock Joint is being installed on sand, the spacings may be increased to a maximum of 2 times the width of the path. These recommendations may alter in different climate and soil conditions. In this case you should consult your engineer or Lock Joint Australia for further advice.Joints such as saw cuts, or dummy joints, to create control joint are not necessary when Lock Joint is used in a path, as Lock Joint is a contraction/control joint.

PreparationPreparation for laying paths is vitally important. The base for a path must be levelled and compacted with clean sand. Where sand is not available, plastic fi lm should be laid to provide the path with a surface to move upon as it expands and contracts. Dips in the base of a path inhibit the natural movement of concrete expansion and contraction, causing extra stress in the concrete panel and risk an unsightly crack.

Concrete StrengthLock Joint Australia recommends concrete for paths have a minimum strength of 25 MPa; essentially to allow for those occasions where a light vehicle drives over or parks on a path. Where a path will be used only by pedestrians or cyclists, and there is no chance of vehicular use, then the concrete strength need only be 20 MPa.

Expansion JointsAs a general rule, where Lock Joint is used, an expansion joint should be placed every 50m in a straight, unhindered path or at the start of a deviation of a curve in the path. This is done more as a precautionary measure, as the expected expansion of the concrete panels should be accommodated by the space (at either side of the Lock Joint piece) created by the natural shrinkage of the concrete panel. An expansion joint must be used where the new path meets a fi xed object such as another path, a kerb edge or a building.

Position the Lock Joint

Pour theconcrete

Remove clampsand pegs,

then screed.

Removeholding bars.

Remove zipfrom capping.

Bullfl oat, trowel,brush fi nish.

The endproduct.

Paths

With Without

Lock Joint™