SMA-13沥青混凝土高温性能相关特性研究

Research on Correlated Characteristic of High Temperature Performance of SMA-13 Asphalt Concrete

为深入研究SMA-13沥青混凝土高温性能相关特性,对不同纤维类型下SMA-13混合料析漏损失、飞散损失以及纤维掺量与动稳定度之间的关系进行了试验分析。结果表明:任意纤维类型下,SMA-13沥青混凝土的动稳定度均表现出随着析漏损失/飞散损失增加,动稳定度下降的现象,且与析漏损失/飞散损失呈线性相关性;随着纤维添加量的增加,SMA-13混合料的动稳定度增大,表明纤维对于提高SMA-13混合料高温稳定性具有显著作用,但增长幅度出现了下降的趋势;纤油比与动稳定度呈线性关系,木质纤维:DS=-545. 07ρ_1+1719. 1;玄武岩纤维:DS=-545. 07ρ_2+1719. 1,确定木质纤维时最佳纤油比为0. 61,玄武岩纤维时最佳纤油比为1. 0。

In order to further study the correlated characteristic of high temperature performance of SMA-13 asphalt concrete, the test analysis on the relationship between run-off loss, flyoff loss and fiber content and dynamic stability of SMA-13 mixture under the different fiber types is made. The results show that： under the random fiber type, the dynamic stability of SMA-13 asphalt concrete decreases with the increase of run-off loss/flyoff loss, and shows a linear correlation with run-off loss/flyoff loss; with the increase of additive amount of fiber, the dynamic stability of SMA-13 mixture increases, which shows that fiber has a significant effect on the improvement of high temperature stability of SMA-13 mixture, but the increasing range has a decreasing trend; fiber oil ratio shows a linear relationship with the dynamic stability, wood fiber： DS=-545.07ρ1＋1719.1;basalt fiber： DS=-545.07ρ2＋1719.1, the best fiber oil ratio is 0.61 when the wood fiber is determined, and that is 1.0 when the basalt fiber is determined.