级配变化对水泥稳定碎石材料疲劳性能影响的研究  

Research on Fatigue Performance of the Different Gradation of Cement Stabilized Crushed Stone

作　　者：孙荣山[1] 汪水银[2] 

机构地区：[1]北京市路政局,北京100053 [2]交通部公路科学研究院,北京100088

出　　处：《公路交通科技》2007年第6期57-61,65,共6页Journal of Highway and Transportation Research and Development

摘　　要：为分析材料级配的变化对于水泥稳定碎石材料疲劳耐久性的影响，优选3种由细到粗的级配类型，采用MTS仪器对养生3个月龄期的水泥稳定碎石材料的100mm×100mm×400mm的中梁进行疲劳性能室内试验研究。通过室内试验数据的分析研究发现，水泥稳定碎石材料疲劳性能对于级配的敏感性较强，最粗级配的材料性能最差，说明级配过粗对材料和路面结构的耐久性不利；而且通过试验分析发现，所选择的3种级配的水泥稳定碎石材料的疲劳指数基本上处于国际上公认的11～33之间。The 1130 mm × 100 mm× 400 mm girders of three different gradations of cement stabilized crushed stone are tested by fatigue bending test with MTS.The purpose is to analyze their fatigue performances. Based on the test data, it is concluded that the fatigue performance is sensitive to the gradation of the cement stabilized crushed stone. It is infaust to the durability of the material that the gradation is too coarse. Nf of Y gradation （4.75 mm sieve passing 30.34% ） is 4.01 E ＋ 05 whereas Nf of W gradation （4.75 mm sieve passing 39.98%） is 3.55 E ＋ 16.Since 4.75 mm sieve passing increased from 30.34% to 39.98%, Nf increased 1E ＋ 11 power. The fatigue indexes of the three gradations CSCS are between 11 and 33.

关 键 词：道路工程 水泥稳定碎石 试验 疲劳性能 疲劳弯曲法 耐久性 

分 类 号：U416.214[交通运输工程—道路与铁道工程]