环境因素对温拌SBS改性沥青混凝土拉伸性能的影响  

Effect of Environmental Factors on Tensile Properties of Warm Mix SBS Modified Asphalt Concrete

作　　者：周志刚[1] 韩乐 罗根传[1] 俞文生[1] 申传明 ZHOU Zhigang;HAN Le;LUO Genchuan;YU Wensheng;SHEN Chuanming(Key Laboratory of Road Structure and Material of Ministry of Transport,Changsha University of Science&Technology,Changsha,Hunan 410004,China)

机构地区：[1]长沙理工大学道路结构与材料交通行业重点实验室,湖南长沙410004

出　　处：《公路工程》2018年第6期52-55,156,共5页Highway Engineering

基　　金：国家自然科学基金资助项目(51378084);交通运输部应用基础研究项目(2014319825060);广西交通科技计划项目([2013]100-29);江西交通科技计划项目(2011C0063)

摘　　要：为探究环境因素对温拌SBS改性沥青混凝土拉伸性能的影响,通过开展不同水环境(无水和浸水)、温度条件(5,15,30,40,50℃)下的间接拉伸强度试验和不同水环境、应力水平(0. 4,0. 5,0. 6,0. 7)下的间接拉伸疲劳试验,对比分析了水、温度和荷载应力对AC-20温拌SBS改性沥青混凝土拉伸性能的影响。结果表明,随着温度升高,劈裂强度显著下降。与无水条件相比,浸水会削弱劈裂强度和间接拉伸疲劳性能。随着荷载应力的增大,疲劳寿命急剧降低。高荷载应力和浸水会严重缩短AC-20温拌SBS改性沥青混凝土的疲劳寿命。In order to explore the influence of environmental factors on the tensile properties of warm mix SBS modified asphalt concrete,the effects of water,temperature and loading stress on the tensile properties of AC-20 warm mix SBS modified asphalt were studied by carrying out indirect tensile strength tests,which is under different water environment(including anhydrous and saturation)and temperature conditions(including 5,15,30,40,50℃),and indirect tensile fatigue tests,which is under different water environment and stress levels(including 0.4,0.5,0.6,0.7).Results show that the splitting strength decreases significantly with the increase of temperature.Compared with anhydrous condition,the saturation can weaken the splitting strength and the indirect tensile fatigue performance.The indirect tensile fatigue life decreases rapidly with the increase of loading stress.High loading stress and saturation can severely shorten the fatigue life of AC-20 warm mix SBS modified asphalt concrete.

关 键 词：温拌沥青混凝土 SBS改性沥青 间接拉伸强度 间接拉伸疲劳 环境因素 

分 类 号：U414[交通运输工程—道路与铁道工程]