EngineeringMaterials EngineeringBuilding MaterialsPavement EngineeringSurface EngineeringAsphalt MaterialsBituminous MaterialsSealing PracticesAggregate MorphologyAggregate TheoryBinder SelectionBinder SystemsBituminous SealantsSeal DesignSeal MaterialsSealing Design
The report is an update of earlier Austroads sprayed seal design procedures based on the philosophy of filling voids in the aggregate matrix with binder to a depth of about one half to two thirds the height of the aggregate when laying on its least dimension. Adjustments and allowances are incorporated in the procedures to cater for aggregate shape, traffic level, embedment, existing surface texture, hardness of existing surfaces and absorption of binder by either aggregates or existing substrate. The design procedures cover single/single seals and double/double seals with Class 170 bitumen, Class 320 bitumen, multigrade binder, polymer modified binder and emulsions. Geotextile sprayed seals are also covered. Brief sections on treatment selection and materials are provided as background to the design processes.