Evaluation of Modulus Comparison of High Modulus Asphalt Mixtures

Three methods and their acting mechanism in improving the modulus of asphalt mixture are introduced,which are adopting high modulus asphalt,mineral fiber modified asphalt and PR Plast Module additive asphalt.By comparing the indirect tensile stiffness modulus under 40℃ between the core samples of the test section and the normal section of the pavement,the modified effects of the three methods are evaluated.The test results show that the high modulus asphalt,mineral fiber modification and PR Plast Module additive can all enhance the indirect tensile modulus of asphalt mixture,thus improve the rutting resistance of the pavement.Comparatively,the high modulus asphalt has the most obvious effect in improving the modulus of asphalt mixture,and the other two methods have almost equal effect.