橡胶-纤维微表处混合料路用性能及降噪特性研究

Research on road performances and noise reduction characteristic of rubber-fiber micro-surfacing mixture

通过添加橡胶颗粒和纤维对微表处混合料进行复合改性以达到改善其性能的目的,为了系统研究混合料的路用性能,通过对混合料关键参数进行确定,围绕混合料耐磨耗性能、水稳定性能以及抗滑性能的主要影响因素进行研究,并结合自主研发的室内轮胎加速下滑系统,对混合料的降噪性能进行试验分析。试验结果表明:当加入3%的橡胶颗粒及0.2%的聚酯纤维,最佳油石比为7.2%时,微表处混合料耐磨耗性能、水稳定性能均得到显著提高,抗滑性能也比普通沥青混合料得到明显的改善,同时,混合料的噪声水平也得到有效的降低,复合改性微表处混合料甚至比普通微表处混合料噪音值减小2.9 d B。

In order to research road performance of rubber-fiber compound modified micro-surfacing mixturesystemically,key parameters of mixture were determined,and factors effecting on wear resistance performance,water stability and skid resistance performance of micro-surfacing mixture were studied.Based on indooraccelerated rolling test system invented by our research group,the noise reduction performance ofmicro-surfacing mixture was tested and analyzed.The results show that when the optimum content of rubberparticle and the polyester fiber are3%and0.2%respectively,and the optimum asphalt content of mixture is7.2%,the wear resistance performance,water stability and skid resistance performance are significantly improved.Meanwhile the noise level of mixture can also be effectively reduced,and the noise value of compound modifiedmicro-surfacing mixture is even2.9dB lower than that of common micro-surfacing mixture.