沥青混合料低温抗裂性能评价方法的验证研究

Study of Evaluation Method for Low Temperature Anti-cracking Performance of Hot Asphalt Mixture

试验通过劈裂试验综合考虑了沥青混合料脆化点和-10℃劈裂破坏竖向位移,提出用低温指数评价沥青混合料低温抗裂性能的方法。试验结果证明,用低温指数评价沥青混合料的低温抗裂性能是合适的,同时可以根据低温指数优化沥青混合料级配设计,也可以判断不同沥青类型的混合料的低温性能的相对优劣。由于验证性试验较少,低温指数评价沥青混合料的低温抗开裂性能还需要在实践中进一步验证和完善。

In this paper, through the splitting test considering the brittle temperature and asphalt mixture - 10℃ fracturing vertical displacement, using low temperature index evaluation method of low temperature crack resistance of asphalt mixture. Test results show that using low temperature index of evaluating the low temperature crack resistance of asphalt mixture is suitable, also can according to the low temperature index op- timization of asphalt mixture gradation design, also can determine different types of asphalt mixture of the qual- ity of relatively low temperature performance. Due to less confirmatory test, low temperature index of evalua- tion of low temperature cracking resistance of asphalt mixture also need to further verify and perfect in prac- tice.