Research on Freeze-thaw Damage Model and Life Prediction of Asphalt Mixture

To research the resistance ability to freeze-thaw damage of asphalt pavement,freeze-thaw damage model and residue life prediction of asphalt mixture was researched with damage theory.The universal damage model of asphalt mixture was established under the freeze-thaw condition,and the corresponding calculation algorithm was proposed.Then,the model was validated to be efficacious according to kinds of performance test results under rapid freeze-thaw condition.Finally,the practical application of the model in life prediction after freeze-thaw damage was put forward.The results show that(1) the performance of asphalt mixture weakens and loss degree increases with the increases of freeze-thaw cycles;(2) the model could fit to performance index change of asphalt mixture after freeze-thaw cycles preferably;(3) the compressive modulus could be considered to be the important index to evaluate the resistance ability to freeze-thaw damage and life prediction of asphalt mixture.