摘要
研究振动和击实(静压)成型方法对水泥稳定碎石基层材料配合比设计的影响,并分析差别产生的原因。试验中应用振动成型仪对水泥稳定碎石进行振动成型,养生后测定物理力学指标,并与击实(静压)成型试件的性能进行比较。试验结果表明振动成型水稳碎石的最佳含水量和最大干密度与击实成型具有线性关系,振动成型下的最大干密度与击实成型相比平均提高0.04 g/cm3,增加的幅度在1.8%左右;静压成型试件高度的控制精度低于振动成型,且离散性较大;振动成型总体强度比静压成型提高70%,其中60%的强度增加量源在于骨架的嵌挤作用。根据试验结果可知,级配结构性效应的无法发挥和试样高度控制不精确使抗压强度代表值偏高是导致静压法配合比设计水泥剂量偏高的主要因素。
The influence of vibration compaction and static compression method on mix design of cement stabilized macadam roadbase materials is researched and the reason of the difference is analyzed. Vibration compaction is applied for cement stabilized macadam in test, the physical and mechanical indexes are measured after curing, and the property of vibration compacted cement stabilized macadam is compared with that of the standard compacted （ static compressed） specimens. The experiment results show that （ 1 ） the relation between optimum water content and maximum dry density of vibration compacted cement stabilized macadam and standard compacted specimens is linear, the maximum dry density of vibration compacted material increases 0. 04 g,/cm3 compare to that of standard compacted specimens, increasing range at around 1.8 % ; （2） the specimens＇ height control precision of static pressure molding is below than that of vibration molding, and deviation is bigger; （3） the vibration molding specimens＇ strength increases by 70% than that of static compaction molding overall, 60% of the increase in the strength comes from skeleton embedded role ; （4） according to the test results, the failure of the structural effect of gradation and the inaccurate sample height control which make represent compressive strength higher are the main factors resulting in the higher cement dosage in design cement stabilized macadam mixing ratio using static compression method.
出处
《公路交通科技》
CAS
CSCD
北大核心
2013年第2期32-37,共6页
Journal of Highway and Transportation Research and Development
基金
黑龙江省交通厅重点项目(2010120)
