The paper describes research being undertaken at the University of South Australia into the properties and performance of recycled pavement materials stabilised by the addition of a cementitious binder. A total of nineteen soils and twenty binders have been chosen by the Australian State Road Authorities with the combinations of soils and binders for the study being selected on the basis of their availability in various geographic locations. The binders comprise Portland cement with or without the addition of fly ash or granulated blast furnace slag and hydrated lime with either the addition of granulated blast furnace slag or fly ash. A wide range of stabilised materials has been studied. The properties of three stabilised materials, representative of the results obtained in the program, reported in the paper include modulus of elasticity, erodibility and soil classification of the parent material; the elastic properties being essential for the mechanistic design of pavements. The results of field studies to examine the degree of compaction through the depth of the stabilised layer and pavement performance as measured by deflection have been included in the paper. (A)
Abstract