Kingscote Streets Upgrades - Kangaroo Island Council

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8.2.1.1 Portland Cement Portland cement shall comply with AS 3972, Type GP – general purpose. 8.2.1.2 Aggregate Fine and coarse aggregate shall comply with AS 2758.1. 8.2.1.3 Admixtures Admixtures shall not contain chlorides, fluorides or nitrates and if approved for use shall comply with AS 1478. No admixture shall be used without a written approval from the Superintendent. 8.2.1.4 Reinforcement All reinforcement shall comply with the requirements of AS 4671. Bending of reinforcement shall comply with AS 3600. 8.2.2 Tactile Surface Indicators Tactile surface indicators shall comply with AS1428.4:2002. 8.2.3 Curing compounds Curing compounds shall comply with AS 3799. 8.3 Construction and Workmanship 8.3.1 Preparation of Supporting Layers Prior to the installation of kerbing the Contractor shall ensure the supporting layers (e.g. sub-base) are to be completed in accordance with the design drawings and the granular pavement section of this specification. 8.3.2 Kerbing Kerbing shall be constructed to the alignment and levels as detailed in the drawings. The Contractor shall ensure that the alignment and levels are set-out by the contractor’s surveyor with offsets and survey marks as required. Kerbing where detailed shall be constructed on a uniform radius with smooth transitions to straight sections. Kerbing shall be constructed using fixed forms or machine-laid slip forming. Kerbing shall be finished to produce a neat appearance of uniform colour, with sharp and clean chamfers, smooth and even radii, no ragged edges and a steel trowel, Class A surface finish. Kerbing gutters and spoon drains shall be constructed to be free draining without ponding to the levels as detailed in the design. Reinforcement (where detailed) shall be fixed by means of plastic bar chairs or concrete blocks. Reinforcement shall be placed centrally or as detailed on the drawings with a minimum concrete cover of 50 mm. The kerbs shall be cured by means of a curing compound, uniformly applied in accordance with the manufacturer’s recommendations. The Contractor shall nominate the proposed method of curing, curing compound and application rate. Property crossovers shall be provided in the kerb and gutter where required to match existing or as detailed in the drawings. The exact location and length shall be confirmed with the Superintendent. 8.3.3 Kerb Joints Shrinkage control joints shall be spaced at 2.5 to 3.0 m intervals and shall be spaced uniformly where practical. The joint shall be cut using a spacer or guillotine to a minimum of 50% of the cross sectional area. The joint shall be tooled to a depth not less than 20 mm to produce a neat groove less than 5 mm in width. Ref No. 20120236SA1 Kingscote Streets Upgrades Technical Specification 39
Wherever the work of placing concrete is delayed until the concrete has taken its initial set, the point of stopping shall be deemed a construction joint. Construction joints shall be located to maintain the spacing of shrinkage joints and shall be avoided in entranceway inverts, pram inverts and radii at street corners. The construction joints shall be straight and perpendicular to the kerb face and vertical in the kerbs and shall be tooled off to provide a V joint. The concrete kerb and gutter on either side of the construction joint shall be finished to the line and levels as shown on the drawings with no difference in line or level across the joint. 8.3.4 Kerb Ramps Kerb ramps shall be constructed integrally with the gutter and shall include surface tactile indicators as detailed in the drawings. Shrinkage Joints shall be provided at the intersection of the kerb ramp and the adjacent kerb and gutters on either side. Tool joints shall be provided in the kerb ramps as detailed in the drawings. The kerb ramps shall be finished with a non-slip broom finish. The alignment of the broom finish shall be perpendicular to the kerb ramp. 8.3.5 Drainage Pit Aprons Drainage pit aprons shall be constructed integrally with the drainage pit to the alignment as detailed on the drawings. 8.3.6 Stormwater Outlets A galvanised steel stormwater outlet to suit the kerb profile shall be provided for each residential property as shown on the design drawings. The invert of the outlet shall be 5 mm above the invert of the gutter. Where there is no existing stormwater outlet, the stormwater outlet shall be provided on the low side of each property or as nominated on site by the Superintendent. Where there are existing stormwater outlet pipes from adjacent properties, a stormwater outlet shall be provided to match the existing. Where required the existing outlet pipes shall be adjusted or relaid as necessary to maintain proper falls and drainage. Any pipe replacement shall be made using 90 mm nominal diameter uPVC pipe or approved equivalent, or shall be equivalent to the existing construction. 8.3.7 Backfilling of Kerbs Prior to the installation of the pavement basecourse the kerbing shall be backfilled. The Contractor shall ensure the kerbing is sufficiently cured prior to backfilling and care should be taken to protect the kerbing from damage during backfilling operations. 8.4 Quality Requirements – Kerbing 8.4.1 Inspections The following Hold Points are required during the construction of kerbing: • H-K 1 • H-K 2 First concrete pour. (subsequent pours are witness points) Water testing of kerbing prior to installation of adjacent structure The following Witness Points are required during the construction of kerbing: • Installation of curing compound • Second pour and any subsequent concrete pours • Backfilling curing prior to installation of base course. Ref No. 20120236SA1 Kingscote Streets Upgrades Technical Specification 40
Page 1 and 2: Kingscote Streets Upgrades Technica
Page 3 and 4: Table of Contents 1 General Provisi
Page 5 and 6: 5.2.2 Quality Testing 23 5.2.3 Tole
Page 7 and 8: Table 4.2 Compaction requirements f
Page 9 and 10: Table Error! No text of specified s
Page 11 and 12: The Contractor shall be responsible
Page 13 and 14: • Lateral supports - provide late
Page 15 and 16: • Material, which, after compacti
Page 17 and 18: All areas disturbed by the excavati
Page 19 and 20: 3.3.8.2 Placing Fill The method of
Page 21 and 22: 3.4.2 Materials Suitable materials
Page 23 and 24: 3.4.5 Tolerances Construction Toler
Page 25 and 26: 4.2.4 Concrete Concrete grade for d
Page 27 and 28: 4.3.8 Pipe Surround Bedding materia
Page 29 and 30: No pumping will be permitted during
Page 31 and 32: All concrete work shall be in accor
Page 33 and 34: 5 Pavement Subgrade This section of
Page 35 and 36: 5.2.4 Acceptance Criteria Areas whe
Page 37 and 38: 6.3.3 Compaction of Granular Paveme
Page 39 and 40: The following test procedures shall
Page 41 and 42: 7 Spray Seals This section of the s
Page 43 and 44: • retains aggregate after applica
Page 45 and 46: The application temperatures for pr
Page 47 and 48: 7.5 Quality Requirements - Spray Se
Page 49: 8 Kerbing This section of the speci
Page 53 and 54: 9 Verges, Footpaths and Driveways T
Page 55: Footpaths and driveways Absolute ±

Kingscote Streets Upgrades - Kangaroo Island Council

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