骨架密实结构水泥稳定碎石性能试验研究  

Research on performance test for cement stabilized aggregate composed of skeleton dense structure

作　　者：何昌轩[1] 

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《交通科学与工程》2011年第4期6-11,共6页Journal of Transport Science and Engineering

基　　金：上海市科学技术委员会科研计划项目(10dz1202500)

摘　　要：采用振动成型法,进行了骨架密实型水泥稳定碎石混合料的设计,研究了振动时间对混合料性能的影响.振动时间对混合料的最大干密度影响不明显,但对水泥稳定碎石强度有较大的影响.选取不同的4.75mm通过率、水泥的质量分数以及水的质量分数的混合料分别进行击实、强度和干温缩试验.击实和强度的试验结果表明:对于同样的级配,水泥的质量分数越大,其最大干密度、无侧限抗压强度和劈裂强度就越大;水泥的质量分数相同的情况下,4.75mm通过率为30%混合料的最大干密度最大、强度最佳.干温缩的试验结果表明:在水的最佳质量分数下,随着水泥质量分数的增加,混合料的干缩系数变大,温缩应变增加.4.75mm通过率为30%混合料的温缩应变最小.Cement stabilized aggregate composed of skeleton dense structure designed by vibratory compaction method,how the time of vibration influence the performance of mixtures is investigated,vibration time has no effect on the maximum dry density but has obvious effect on unconfined compression strength.Different percent passing for sieve pore of 4.75 mm,cement content,water content are considered for compaction test,strength test,dry shrinkage test and thermal contraction test.The results indicate that based the same gradation,maximum dry density,unconfined compression strength and cleavage strength increase with the increase of cement content.30% percent passing for sieve pore of 4.75 mm could have optimal intensity under the same cement content.Shrinkage coefficient and temperature contraction coefficient increase along with the increase of cement content under optimum water content.30% percent passing for sieve pore of 4.75 mm could have the least temperature contraction strain.

关 键 词：骨架密实结构 水泥稳定碎石 振动成型法 无侧限抗压强度 劈裂强度 干缩系数 温缩应变 

分 类 号：U416.214[交通运输工程—道路与铁道工程]