Kingscote Streets Upgrades - Kangaroo Island Council

9.3.4 Unsealed Footpath
Where the specified works interfere with existing unsealed footpath areas, or where footpaths are
nominated on the drawings as unsealed, the reinstatement / construction shall consist of 100 mm
compacted thickness of PM 2/20 quarry rubble.
The rubble shall be placed and compacted to a density of not less than 95% of the maximum
modified dry density as set out in AS 1289 5.2.1 using approved compaction equipment. The rubble
shall be finished to conform to the adjacent existing paths in level and appearance and to give
satisfactory drainage properties.
The Contractor shall ensure that completed works are not hazardous or threaten in any way the
safety of the general public.
9.3.5 Concrete Driveway
Concrete footpaths shall be constructed to as detailed in the design drawings or to a minimum of
100 mm granular sub-base with 125 mm thickness concrete base, and reinforced with SL72 steel
fabric.
Reinforcement shall be free from loose mill scale, loose rust, oil, grease and other non-metallic
coatings which would reduce the bond to the concrete.
Bar chairs, spacers and ties made of concrete, steel or plastic shall be used to support all
reinforcement in its position within the tolerance specified in AS 3600 until the concrete has
hardened.
Reinforcement shall be located in the upper half of the driveway slab with a minimum 40 mm top
cover, and terminated 75 mm from 50 mm from joints.
9.3.5.1 Concrete Driveway Joints
Expansion joints shall be 10 mm wide provided at minimum 12 m intervals. Expansion joints shall
be provided with a full depth pre-moulded expansion joint filler, (bitumen impregnated fibre board or
similar).
In areas where new concrete is to be placed against and existing construction joint, the surface of
the hardened concrete shall be thoroughly roughened and cleaned to remove any loose material,
debris and laitance.
9.3.6 Grassing
Following filling, spreading and levelling of topsoil, all exposed batter slopes, excavated and filled
areas shall be reseeded.
Fertiliser shall be applied to the areas to be grassed at the rate of 30 grams of 2:1 superphosphate
and sulphate of ammonia or other approved fertiliser per square metre. The area shall then be
raked, seed spread and lightly raked again.
A seed mix containing couch and perennial rye grasses or an approved alternative mix, shall be
spread at a rate of 30 grams per square metre and watered to ensure germination and growth during
the establishment period.
As an alternative method of application, hydromulching using a seed/fertiliser mix similar to that
specified above may be used.
9.4 Quality Requirements – Verges, Footpaths and Verges
9.4.1 Tolerances
The following tolerances shall apply to finished kerbing and footpaths:
Table 9.1
Item
Tolerances on Verges, Footpaths and Driveways
Tolerance
Ref No. 20120236SA1 Kingscote Streets Upgrades Technical Specification 43