06/1168 - Change a Development Approval [As Published] · 132006.1168.02

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weather conditions unless special provisions are made to the approval of the Contract Administrator.

Before priming, the pavement shall be broomed free of all loose material, dust and caked material, and
any defects made good. A clean, mosaic, tightly bound surface shall be presented. Should conditions
require, and if approved by the Contract Administrator the surface may be lightly watered immediately
prior to priming.

The following seal design is an estimate only. The Contractor shall carry out seal designs and submit to
the Contract Administrator for approval prior to sealing.

The first coat seal shall be cutback binder consisting of 90% bitumen and 10% power kerosene applied
at an estimated rate of 1.5 I/m?, measured at a temperature of 15°C and applied at a temperature
between 168°C and 178°C. The binder is to be covered with aggregate within 10 minutes after spraying.

The second coat seal shall be cutback binder consisting of 90% bitumen and 10% power kerosene
applied at an estimated rate of 0.9 I/m?, measured at a temperature of 15°C and applied at a temperature
between 168°C and 178°C. The binder is to be covered with aggregate within 10 minutes after
spraying.

The bitumen shall be modified with 0.40% wet fix or similar approved during wet weather laying.

Seal designs using emulsion-based binder will also be considered for approval by the Contract
Administrator.

9.5 Aggregate

Aggregate shall be crushed from hard, sound, durable rock. The percentage loss as measured by the
Los Angeles Abrasion Test shall not exceed 30. All aggregates shall be free of excess dust, and the
Contract Administrator may order the pre-washing of dusty aggregate.

Aggregate test procedures are to be in accordance with Queensland Main Roads Standard Specification
MRS 11.22.

Unless otherwise approved, the first coat seal blinding shall be a nominal 14mm pre-coated aggregate,
applied immediately after spraying at an estimated rate not less than 1 cubic metre per 90 square metres
and sufficient to prevent lifting of the sealed surface by vehicles.

Unless otherwise approved the second coat seal blinding shall be a nominal 10mm pre-coated aggregate
applied at an estimated rate not less than 1 cubic metre per 100 square metres and sufficient to prevent
lifting of the sealed surface by vehicles.

The surface is to be rolled until the aggregate is firmly embedded in the binder.

All surplus aggregate shall be swept up and removed from site not less than seven days after the
completion of the rolling or as approved by the Superintendent.

9.6 Acceptance Tolerances

The width of the prime shall not vary by more than + 150mm - 0mm.

41/22382/11840 Girraween Sports Precinct 48
Earthworks Package