不同外掺剂改性沥青混合料路用性能对比研究

Study on Pavement Performance of Different Admixtures Modified Asphalt Mixture

为改善沥青路面的使用质量,延长其使用寿命,研究沥青混合料中添加不同外掺剂来改善其高低温性能的问题,选用AC-20C型级配,通过对比SBS、SBS+进口车辙剂、SBS+国产车辙剂和SBS+聚酯纤维的改性沥青混合料的高低温性能,分析了不同外掺剂对于改善沥青混合料高低温性能的作用机理。试验结果表明:掺加进口或国产车辙剂以及聚酯纤维都能使沥青混合料的高低温性能得到明显改善,但从性价比角度考虑,国产车辙剂具有更广泛的推广应用价值。

In order to improve the quality of asphalt pavement and extend the service life, it is important to find out how to enhance the high and low temperature performance by adding different admixtures. The gradation was set to be AC-20C, and the improvement mechanism of the high and low temperature performance of asphalt mixture was analyzed by adding different admixtures such as SBS, SBS-t-imported rut agent, SBS＋domestic rut agent and SBS~ polyester fiber. The test results show that all these admixtures could improve the high and low temperature performance of asphalt mixtures. But based on the cost, domestic rut agent has better application value.