结构自诊断沥青混凝土路用性能评价研究  

Properties Evaluation of Self-monitoring Asphalt Concrete

作　　者：孙长军[1,2] 吴少鹏[2] 唐宁[2] Kim Jenkins 潘攀[2] 李文涛[2] 

机构地区：[1]唐山曹妃甸发展投资集团有限公司,唐山063210 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [3]University of Stellenbosch

出　　处：《交通科技》2013年第2期130-132,136,共4页Transportation Science & Technology

基　　金：中国-南非合作项目(2010DFA8290)资助

摘　　要：通过马歇尔稳定度、冻融劈裂、车辙以及四点弯曲疲劳试验,对比分析评价了结构自诊断沥青混凝土水稳定性、高温稳定性和疲劳特性等路用性能。结果表明:石墨的掺入会在一定程度上降低结构自诊断沥青混凝土水稳定性能,但是由于同时降低了沥青胶浆的温度敏感性,因而对其高温稳定性具有改善作用;与普通沥青混凝土相比,结构自诊断沥青混凝土的疲劳寿命更短;并且疲劳破坏速率呈现出温度依赖性,在同一应变水平下,温度下降时,传导型沥青混凝土的破坏速率加快,疲劳寿命缩短。In this study,the Marshall stability,freeze-thaw split,rutting and four-point bending tests were conducted in order to evaluate the pavement performances of the self-monitoring asphalt concrete such as water stability,high temperature stability and fatigue property etc by comparison analysis.The experiment results shows that,due to its lubricity,the graphite degrades the water stability of the self-monitoring asphalt concrete,but the graphite can decrease the temperature susceptibility of asphalt mortar and hence it can improve the rutting resistance of self-monitoring asphalt concrete.Compared with the common asphalt concrete,the sel-monitoring asphalt concrete presentes shorter fatigue life.Moreover,the fatigue failure rate exhibites a strong temperature dependence.In the same strain level,the failure rate will be accelerated and the fatigue life will be shortened as the temperature is reduced.

关 键 词：道路工程 结构自诊断 沥青混凝土 性能评价 对比分析 

分 类 号：U414.75[交通运输工程—道路与铁道工程]