Highways Agency Reports

A research project that investigated the effect of composition of hot rolled asphalt wearing course material on performance related properties of the material, as measured in the laboratory, is described. The influence of variations in type of fine aggregate, fine aggrgate grading, binder content, binder penetration and binder softening point were studied. The effects of these compositional variations on mechanical stability, creep stiffness and resistance to permanent deformation were examined. The results of the tests were checked for the degree of correlation between parameters.