REDUCTION OF OXIDATIVE HARDENING OF ASPHALTS BY TREATMENT WITH HYDRATED LIME -- A MECHANISTIC STUDY

Abstract

The paper reports on a study to compare the susceptibility of the untreated and lime-treated asphalts to oxidative hardening when subjected to laboratory aging and to suggest a mechanism explaining the action of lime. Four different asphalts were tested, along with four aggregate types, and solvents and hydrated lime. Testing procedures are outlined, and the discussion of results goes into such things as the effect of lime treatment and aggregate type on resilient modulus, chemistry of lime action, mechanism of lime action, and others.