Properties of GGBS-Bitumen Emulsion Systems with Recycled Aggregates

A range of storage grade macadams composed of recycled aggregates from various sources and bound by bitumen emulsion and Ground Granulated Blastfurnace Slag (GGBS) was investigated. Previous work suggests that certain properties of bitumen emulsion mixtures may be enhanced by the addition of a cementitious binder. This paper focuses on the contribution of the bituminous and GGBS components to the mechanical properties of cold mixtures in different environments. The results show that the inclusion of GGBS may enhance stiffness and strength development in high humidity conditions whilst the bitumen emulsion renders the mixtures more ductile and maintains shelf life.