specification for subdivision construction of road works and drainage
specification for subdivision construction of road works and drainage
specification for subdivision construction of road works and drainage
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The acceptance <strong>of</strong> the asphalt surface will be determined in accordance with the requirements <strong>of</strong> the<br />
Institute <strong>of</strong> Public Works Engineering Australia (WA Division) <strong>and</strong> Australian Asphalt Pavement<br />
Association (WA Branch) Technical Specification <strong>for</strong> Supply <strong>and</strong> Laying <strong>of</strong> Hot Asphalt Road<br />
Surfacing.<br />
R5<br />
KERBING<br />
R5.1 General<br />
Cast in-situ kerbing shall be constructed using extruded concrete <strong>and</strong> finished as required in AS2876<br />
concrete kerb <strong>and</strong> channel (gutters).<br />
Cross section <strong>of</strong> kerbing shall be in accordance with detail drawings show on the drawings.<br />
R5.2 Placement<br />
Construction shall be carried out in approved method <strong>and</strong> shall be extruded <strong>and</strong> vibrated to give<br />
maximum density. Concrete strength shall develop a minimum twenty eight (28) day strength <strong>of</strong> 32<br />
MPa.<br />
The extruded kerb shall be laid on the freshly swept surface <strong>of</strong> the primer sealed bitumen pavement,<br />
the surface is to be cleaned <strong>of</strong> all <strong>for</strong>eign or loose <strong>and</strong> broken pavement material.<br />
Finish to top <strong>and</strong> <strong>road</strong> face <strong>of</strong> kerb shall be uni<strong>for</strong>mly smooth <strong>and</strong> free from voids <strong>and</strong> air pockets.<br />
The line <strong>of</strong> the kerbing shall be parallel to the centre line <strong>of</strong> the <strong>road</strong> <strong>and</strong> the kerbing on both sides <strong>of</strong><br />
the <strong>road</strong> shall be exactly parallel to each other, unless shown otherwise on the drawings.<br />
All kerbing shall be laid to correct grades corresponding to the design grade <strong>of</strong> the <strong>road</strong> <strong>and</strong> radius<br />
sweeps <strong>and</strong> intersections.<br />
All kerbing on radii less than 30m shall be fully keyed into the pavement.<br />
All kerbing shall be protected by the Contractor from marking <strong>and</strong> from bitumen overspray.<br />
R5.3 Curing<br />
Kerbs shall be sprayed with Calcure "D" or equivalent curing membrane within two hours <strong>of</strong> surface<br />
finishing <strong>of</strong> the concrete.<br />
R5.4 Joints<br />
Kerbs shall be cut completely through to give 10mm expansion joint every 4.5 metres <strong>of</strong> kerb length.<br />
Immediately after extrusion, contraction joints shall be <strong>for</strong>med by a grooving tool at every 1.5 metres.<br />
A 10mm expansion joint shall be left either side <strong>of</strong> all <strong>road</strong> <strong>drainage</strong> gullies <strong>and</strong> tangent points <strong>of</strong> all<br />
curves.<br />
Specification <strong>for</strong> Subdivision Construction <strong>of</strong> Road Works <strong>and</strong> Drainage<br />
Rev. 1 – February 2013<br />
40
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