The adhesion between bitumen and aggregate is fundamental to the durability of asphalt and sprayed seal pavements — and stripping, where water displaces the bitumen film from aggregate surfaces, is one of the most damaging failure modes in flexible pavement systems. Western Geotechnical Laboratory Services (WGLS) provides accredited Resistance to Stripping testing (AS 1141.50), assessing the affinity between aggregate and bituminous binders under wet conditions. This test is a critical quality control measure for asphalt producers, road authorities, and pavement engineers specifying aggregate for use in bituminous pavement applications across Western Australia.
