新疆地区水泥稳定砂砾基层的施工技术

Construction Technology of Cement Stabilized Gravel Base in Xinjiang Area

针对新疆地区水泥稳定砂砾配合比设计和拌合工艺问题,对比分析了重型击实法和振动击实法对混合料最大干密度和最佳含水量的影响。结果表明:振动击实法测得的最大干密度是重型击实法的1.02~1.03倍,最佳含水量也有所增大;不同水泥剂量下,非振动拌合水泥稳定砂砾的强度要小于振动拌合,且变异系数大于振动拌合方式;振动击实法和振动拌合工艺能够很好地解决芯样不完整、强度不足等水泥稳定砂砾的常见弊病。

Aiming at the problem of mix design and mixing process of cement stabilized gravel in Xinjiang area,the effects of heavy compaction method and vibratory compaction method on maximum dry density and optimum water content were compared and analyzed.The results show that the maximum dry density measured by the vibratory compaction method is 1.02-1.03 times as much as that by heavy compaction method,and the optimum water content is also increased.Under different cement dosages,the strength of non-vibratory mixing cement stabilized gravel is weaker than that of vibratory mixing,and the coefficient of variation is greater than that of vibratory mixing.The vibratory compaction method and the vibratory mixing process can well solve the common defects of cement stabilized gravel such as incomplete core and insufficient strength.