Evaluation Methods of High Temperature Performance of Asphalt Mixture with PR Additives

Abstract:

An investigation is made into the evaluation methods of the performance of the asphalt mixture with PR additives at high temperature based on the rutting test,uniaxial penetration test and repeated shear test (constant height) (RSCH).The results of the rutting test show that,for the confliction between dynamic stability and rutting depth,it is hard to discriminate the impacts of PR.S(PR plast S) and PR.M(PR flex module) on the high temperature performance of mixtures.With the ultimate shearing strength of uniaxial penetration test and k1,k2,n,γ of RSCH,as the evaluation indexes of high temperature performance of the asphalt mixture with PR additives,the same conclusion is drawn,and both of the two methods are suitable for high temperature performance evaluation.The four indexes of RSCH not only represent high temperature performance of the asphalt mixture with PR additives,but also discriminate the different steps of shearing deformation progress,therefore,the mixture damage mechanics is depicted.