石灰改良土灰剂量“衰减”影响因素研究

Study on Factors Influencing Lime Content “Decrease”of Lime Treated Soils

以沿海高速公路启东某路段路基土为研究对象,在对现行EDTA测定方法进行分析研究的基础上,为了研究石灰土灰剂量衰减现象的影响因素,笔者进行了不同石灰掺量的石灰土击实试验、EDTA消耗量与养护时间、初始含水率之间关系试验,试验结果显示随着石灰剂量的增加,石灰土的最大干密度线性减小而最优含水率线性增大,EDTA的消耗量随着养护时间的增加而减小,压实状态下减小速率比未压实的速率大,且压实的石灰土的灰剂量衰减存在转点,EDTA消耗量随着初始含水率的增大而减小,过筛时所测定的EDTA消耗量结果比不过筛时大。

Taking the coastal highway roadbed soils in Qidong as the research object,based on the analysis of the current EDTA methods,and in order to study the influences of lime content＂decrease＂of lime treated soils,the author carried out the lime soil compaction test,test on relationship between EDTA consumption and curing time,water content. From the test we can give the results that with the increasing of lime content the dry density of lime treated soils decreased lineally and with the increasing of curing time the EDTA consumption has been decreased,the decreasing speed of compaction states is larger than uncompaction,and it has a turning point in compaction. The consumption of EDTA has decreased with the increasing of water content.