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

9. Two Coat Seal — Prime Coat

9.1 General

The final seal design shall be done by the Contractor and submitted to the Contract Administrator for
approval before application.

9.2 Authority to Commence Priming

Priming shall not be undertaken until the Contract Administrator or the Contract Administrator's
representative has inspected the pavement and approved the works to proceed.

9.3 Plant

9.3.1 Spraying Equipment

All spraying equipment shall comply with the requirements of the NAASRA ‘Specification for
Performance Requirements for Mechanical Sprayers of Bituminous Materials’.

When requested by the Contract Administrator, the Contractor shall provide a current certificate and
calibration chart issued by the Queensland Department of Main Roads before commencing spraying
operations.

9.3.2 Rollers
The following rollers may be used:
» Three point self-propelled steel roller of minimum 8 tonnes mass;

» Self-propelled rubber tyred roller minimum 15 tonnes mass,

9.3.3 Trucks

Sufficient numbers of single or tandem-axle trucks with tipper bodies should be made available. The
trucks should be fitted with approved tailgate-mounted metal spreaders. In addition, at least one truck
with drop-sided or tray body for the manual application of aggregate should be provided (as required).

9.3.4 Brooms

A mechanical broom capable of removing all dust and debris from the surface of the road (prior to
spraying), and a drag-broom, capable of evenly spreading aggregate but not so as to dislodge stones
from the mat, should also be provided. Drag-brooming should be avoided if at all possible and only
carried out under strict control after approval by the Contract Administrator.

9.4 Application

The primed base course shall be sufficiently dry with sealing not to be carried out during inclement

41/22382/11840 Girraween Sports Precinct 47
Earthworks Package