Kingscote Streets Upgrades - Kangaroo Island Council

Table 7.3
Aggregate Size
(mm)
Area that can be effectively roller, per hour with each pneumatic multi-wheeled roller
Traffic Volume (Vehicles per lane per day)
1200
Area – m 2 per roller hour
7 or 4,500–5,000 5,000–5,500 5,500–6,000
10 3,000–3,500 3,500–4,000 4,500–5,000
14 2,500–3,000 3,000–3,500 3,500–4,000
Notwithstanding the requirements of the above table, the minimum number of passes over the full
width treated shall be made four passes for primer-binders and C170 binders and six passes for all
other binders.
Rolling shall continue without interruption until the aggregate is firmly embedded in the binder. Roller
speeds shall not exceed 5 km/h for the first two passes and 15 km/h thereafter.
Additional rolling may be ordered by the Superintendent until the Superintendent is satisfied that a
suitable tight, interlocked surface texture has been achieved. Such additional rolling shall be at no
additional cost to the Principal.
7.4.14 Removal of Loose Aggregate
Unless otherwise approved by the Superintendent, the Contractor shall clean the surface of the seal
coat promptly after the completion of the specified amount of rolling to remove all loose aggregate
and within the time limit. The Superintendent is to inspect and approve the pavement surface after
rolling prior to removal of loose aggregate.
Table 7.4
Time limit for removal of Loose Aggregate
Traffic volume (vehicles/lane/day)
Maximum time limits
> 2000 and all Freeways Within 8 hours of sealing
> 1000 to 2000 24 hours of sealing
> 250 to 1000 48 hours of sealing
< 250 5 days of sealing
At all times there shall be no windrow of aggregate on either the sealed surface or shoulder that
could constitute a traffic hazard.
7.4.15 Early Traffic of New Spray Seal Works
Where a new seal is subjected to traffic, vehicles will be allowed to run on the work after initial rolling
has taken place provided traffic is controlled at low speeds and no lateral displacement of aggregate
occurs. Where necessary the contractor shall use patrol vehicles to ensure that traffic travels at
acceptable speeds.
7.4.16 Removal of Surplus Waste Materials
Waste and unused aggregate, bitumen, empty containers or other materials remaining after
completion of the work shall be removed from the site by the Contractor and the work site shall be
left in a neat and tidy condition. Disposal shall be in accordance with the Environment Protection
Act.
Ref No. 20120236SA1 Kingscote Streets Upgrades Technical Specification 35