Study Of Road Performances Of Asphalt Mixture With Anti-rutting Agent

Asphalt concrete pavement was used widely in our country because of its excellent performance. More than 95per of the express way used the asphalt concrete pavement. Under the influence of increasing traffic volume and axial load, overloading, tube running and the continuous high temperature, rutting are the most commonly observed pavement distresses in highways. Since asphalt mixture inherent in the viscoelastic properties, the impact of high-temperature asphalt pavement stability, water stability of the diversity of factors, the complexity of the formation of rutting, makes permanent deformation becoming a worldwide problem. So it is significant to do systematic research on anti-rutting asphalt pavement materials and rational design of asphalt pavement to improve the quality of service, extend the pavement life.Firstly, the design based on the graded asphalt mixture rutting test, Found that by evaluating the dynamic stability of high temperature stability of asphalt mixture performance is not comprehensive enough, Not fully reflect the actual asphalt mixture permanent deformation. The use of a new evaluation index—Complex stability index to evaluate the high-temperature stability of asphalt mixture comprehensively. While identifying the amount of anti-rutting agent.Secondly, the use of a series of tests for performance evaluation of asphalt mixture (including the high temperature performance, moisture susceptibility, stiffness module, etc.) based on the amount of the anti-rutting agent. Including high-temperature performance test show that increasing the temperature or stress alone, the impact on the road is similar. Application of anti-rutting agent of asphalt mixture will not be reduced to the moisture susceptibility, and because of freezing-thaw split test more enhanced operation of water on the negative effects of asphalt mixture, indicating that the freeze-thaw split test is a more effective evaluation of anti-rutting agent of asphalt mixture moisture susceptibility test methods. Evaluation of resilient modulus of asphalt mixture test the merits of anti-rutting agent is not obvious, bending stiffness modulus of asphalt mixture tests showed that after adding anti-rutting agent temperature stability of asphalt mixture increasedFinally, the analyzed the mechanism of anti-rutting agent, a four elements burgers model is selected to describe the viscoelastic behavior of asphalt mixture and analysis of thermal stability of asphalt mixture factors, and the origin7.5 is used numerical fitting of the creep curves resulting in a four elements burgers model, and the combination with the earlier study to evaluate the asphalt mixture, while high temperature stiffness modulus to be proved. The mechanism of anti-rutting agent that can improve asphalt mixture performance.