冻融循环条件下玄武岩纤维改性沥青混合料路用性能研究

Study on Road Performance of Basalt Fiber Modified Asphalt Mixture under Freeze-thaw Cycle

文中开展了玄武岩纤维沥青混合料高低温性能参数与冻融循环次数相关性的分析。结果表明,纤维沥青混合料的飞散损失率与油石比呈现负相关关系,然而其析漏损失率与油石比呈正相关关系;纤维沥青混合料最佳油石比为5.0%,纤维沥青混合料的稳定度及低温劈裂强度均与冻融循环次数近似呈现线性负相关关系;其冻融稳定度损失率与冻融循环次数呈现正相关关系。

This study mainly studied the decay rule of the high and low temperature performance parameters and the number of freeze-thaw cycles of basalt fiber asphalt mixture.The results show that the flying loss rate of fiber asphalt mixture is negatively correlated with the ratio of oil to stone,while the leakage loss rate is positively correlated with the ratio of oil to stone.The optimum oil-stone ratio of fiber asphalt mixture is 5.0%.The stability and low temperature splitting strength of the fiber asphalt mixture are linearly and negatively correlated with the number of freeze-thaw cycles.The loss rate of freeze-thaw stability is positively correlated with the number of freeze-thaw cycles.