乳化沥青冷再生混合料的间接拉伸疲劳性能  

Indirect Tensile Fatigue Properties of Asphalt Emulsion Cold Recycled Mixes

作　　者：严金海[1] 倪富健[1] 杨美坤[1] 

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《建筑材料学报》2011年第1期58-61,77,共5页Journal of Building Materials

基　　金：江苏省交通科技项目(07Y28)

摘　　要：采用Cooper试验机测试了乳化沥青冷再生混合料在不同温度和应力水平下的劲度模量及15℃下的间接拉伸疲劳性能.结果表明:乳化沥青冷再生混合料劲度模量随着温度的升高或应力水平的增加而逐步降低,劲度模量与温度、应力水平均具有很好的线性相关性;在低应力水平(100,200 kPa)下,掺水泥乳化沥青冷再生混合料疲劳性能优于无水泥乳化沥青冷再生混合料,而在高应力水平(300,400 kPa)下,掺水泥乳化沥青冷再生混合料疲劳性能劣于无水泥乳化沥青冷再生混合料.乳化沥青冷再生混合料竖向位移(变形)的发展主要经历了3个阶段,表现出一定的黏弹塑性,其疲劳破坏属于塑性破坏.The stiffness modulus at different temperatures and stress levels and the 15℃indirect tensile fatigue properties of asphalt emulsion cold recycled mixes were determined by using Cooper tester.The results indicate that the stiffness modulus decreases with increasing temperature or stress level.The stiffness modulus has good linear correlation with the temperature or stress level.The fatigue life of asphalt emulsion cold recycled mixes with cement added is longer than that of asphalt emulsion cold recycled mixes at low stress levels（100,200 kPa）,while the fatigue life of the mixes with cement added is shorter than that of the mixes at high stress levels（300,400 kPa）.The development of vertical displacement（deformation） experiences three stages.Asphalt emulsion cold recycled mixes show plastic fatigue failure due to its visco-elastic -plastic characteristics.

关 键 词：乳化沥青 冷再生 劲度模量 疲劳寿命 

分 类 号：U414[交通运输工程—道路与铁道工程]