抗车辙剂和SBS对热拌沥青混合料高温与低温性能的影响  

Influence of anti-rutting agent and styrene butadiene styrene on high-and low-temperature performances of hot-mixed asphalt mixture

作　　者：李萍[1] 孙国伟[1] 王伟 辛颖[1] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]中铁十二局,山西太原030023

出　　处：《兰州理工大学学报》2014年第6期131-135,共5页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51108222)

摘　　要：车辙和开裂是沥青路面的主要病害形式,采用外加剂改善沥青路面的高温与低温性能是防治车辙和开裂的主要措施.本文在不同温度、不同含量抗车辙剂和SBS改性剂试验条件下,采用连续密级配(AC-13、AC-16)和间断级配(SMA-13、SMA-16)两类级配进行高温车辙和低温小梁弯曲试验,对沥青混合料高温和低温性能的影响进行评价.试验结果表明:沥青混合料中添加0.4%抗车辙剂或5%SBS改性剂时,其高温和低温稳定性表现最佳.其中,0.4%抗车辙剂在改善沥青混合料高温变形能力方面优于5%SBS改性剂,而在改善低温抗裂性方面效果不及后者.间断级配沥青混合料的高温稳定性与低温抗裂性优于连续密级配沥青混合料.Ruts and cracks are two major diseases of asphalt pavement. Utilization of added modifier for improvement on high- and low-temperature performance of asphalt pavement is a＇main measure to prevent it from rutting and cracking. In this article, by using continuous dense gradation （AC-13, AC-16） and dis- continuous gradation （SMA-13, SMA-16）, the rutting test at high temperature and bending test of small beam at low temperature were conducted at different temperatures and with different contents of anti-rut- ting agents and modifiers of styrene butadiene styrene （St3S） to evaluate their influence on the high- and low-temperature performance of the asphalt mixture. The results of tests showed that the stability of as- phalt mixture at high and low temperature would be the best when 0. 4 % anti-rutting agent or 5 % SBS modifier were added respectively. High-temperature deformation ability of asphalt mixture with 0. 4% an- ti-rutting agent was higher than that of asphalt mixture with 5 % SBS modifier, while the low-temperature anti-cracking performance of the latter was better than the former. The stability at high temperature asad crack resistance at low temperature of discontinuous gradation was better than that of continuous dense gradation,

关 键 词：热拌沥青混合料 抗车辙剂 SBS改性剂 高温稳定性 低温抗裂性 

分 类 号：TU502.4[建筑科学—建筑技术科学] TU535