New Basegrade Stabilisation Technology Resolves Thin Pavement Issues in Redland City

Abstract

Sealed flexible pavements typically consist of a wearing surface, a base layer and a subbase layer to protect the subgrade from damage caused by traffic loads over time. Local government urban roads in Australia often only have a base layer sitting directly on the subgrade. When the thickness of the existing granular base layer is deemed too thin to satisfy rehabilitation design requirements, the base and subgrade layers can be insitu stabilised simultaneously with an appropriate binding agent. This is termed ‘Basegrade Stabilisation’ (Young, 2020).