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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 subgrade soil of Qidong section of the coastal expressway as the research object, on the basis of the analysis of the existing EDTA determination methods, in order to study the influencing factors of lime soil dust dose attenuation phenomenon, the author carried out the lime soil compaction with different lime content The results showed that with the increase of lime dosage, the maximum dry density of lime soil decreased linearly while the optimum moisture content increased linearly. The consumption of EDTA decreased with the increase of lime dosage. With the increase of curing time, the rate of reduction in the compacted state is larger than that in the non-compacted state, and there is a turning point in the decay of ash content in the compacted lime soil. As the initial moisture content increases, Reduce, sieve when the EDTA consumption measured results than when not screened.