If there are surplus loose particles on any portion of the sealed area, such portion shall be swept lightly to remove the loose particles but not disturb the aggregate embedded in the binder. Double/Double Seals the first coat of a double/double seal shall be applied using a larger sized aggregate than the aggregate used in the second coat; the application rate of aggregate for the coat shall result in more gaps between the aggregate particles than would occur if the same sized aggregate was applied in a single coat seal. Principal Supplied Aggregate Where the actual aggregate spread rate is less than 0.925 times the Spread Rate ordered or approved aggregate spread rate, the cost of any additional aggregate used supplied by the Principal (calculated as below) shall be deducted from payments due to the Contractor. Cost of additional aggregate = Aggregate Cost where: = actual area (m²) covered at rate = rate (in $/m³) stated in Annexure 509B = ordered aggregate spread rate in m²/m³ = actual aggregate spread rate in m²/m³ The cost of aggregate spread outside the specified area (with due allowance for tolerances) shall be deducted from money due to the Contractor at the rate stated in Annexure 509B. 509.43.02 ROLLING AND DRAG BROOMING Immediately application of the cover material, the surface shall be rolled Rolling to the number of complete coverages as stated in Table 509.9 over the Sequence whole area. Where the roller size is not specified then 11 tonne rollers shall be used. A complete coverage is one pass of a roller over the entire area, ie. the total length and width of a spray run being rolled. For the first four complete coverages, rollers shall be operated at speeds less than 7km per hour. Drag brooming shall be carried out after every second pass of rolling. TABLE 509.9 ROLLER SIZE AND COVERAGES
If there are surplus loose particles on any portion of the sealed area, such portion shall be swept lightly to remove the loose particles but not disturb the aggregate embedded in the binder. Double/Double Seals the first coat of a double/double seal shall be applied using a larger sized aggregate than the aggregate used in the second coat; the application rate of aggregate for the coat shall result in more gaps between the aggregate particles than would occur if the same sized aggregate was applied in a single coat seal. Principal Supplied Aggregate Where the actual aggregate spread rate is less than 0.925 times the ordered or approved aggregate spread rate, the cost of any additional aggregate used supplied by the Principal (calculated as below) shall be deducted from payments due to the Contractor. Spread Rate Cost of additional aggregate = Aggregate Cost where: = actual area (m²) covered at rate = rate (in $/m³) stated in Annexure 509B = ordered aggregate spread rate in m²/m³ = actual aggregate spread rate in m²/m³ The cost of aggregate spread outside the specified area (with due allowance for tolerances) shall be deducted from money due to the Contractor at the rate stated in Annexure 509B. 509.43.02 ROLLING AND DRAG BROOMING Immediately application of the cover material, the surface shall be rolled to the number of complete coverages as stated in Table 509.9 over the whole area. Where the roller size is not specified then 11 tonne rollers shall be used. A complete coverage is one pass of a roller over the entire area, ie. the total length and width of a spray run being rolled. For the first four complete coverages, rollers shall be operated at speeds less than 7km per hour. Drag brooming shall be carried out after every second pass of rolling. Rolling Sequence TABLE 509.9 ROLLER SIZE AND COVERAGES
Specification%20509%20Polymer%20Modified%20Bituminous%20Surfacing%205%20Feb%202018.RCN-D18^2387996.DOCX