石灰改性膨胀土击实曲线的双峰特性研究

膨胀土掺石灰改性之后,其粉粒组的含量显著增加.当采用湿法击实时,由于土体保持了原有的结构性并表现出粉土的特性,在某个较低含水率时,击实功没有超过破坏其结构性的程度,出现一个干密度峰值.随着含水率的增加,击实功破坏了土的结构性,土体重新压实,曲线出现了另一个大干密度的峰值.因此,击实曲线表现出不稳定的双峰现象,从而降低了...

Bimodal characters of compaction curve of lime treated expansive soil

Silt content increases significantly during the experiments of lime treated expansive soil.When the wet method is adopted,the soil maintains original structure and performances of silt features.If the water content at a lower level,the compaction power is lower than the structural damage and the compaction curve shows a dry density peak.With the increasing of water content,compaction power exceeds the structural damage and the compaction curve shows another dry density peak.Therefore,the compaction curves s...