冻融作用对石灰土回弹模量及微观结构影响

Freeze-thaw action of lime soil modulus of resilience and microstructure

为了研究石灰改良粉质粘土在冻融循环作用下回弹模量的变化规律,采用承载板法测定土体的回弹模量,探究不同冻融次数、掺灰剂量、含水率及压实度对石灰改良土回弹模量的影响,并对不同冻融次数下的石灰改良土进行微观电镜扫描(SEM),从微观角度进行了分析,得到了一些重要的结论。

In order to study the change rule of modulus of resilience of lime improving silty clay under the action of freeze-thaw cycle,bearing plate method is used to determine the soil modulus of resilience,explore different freezing and thawing times,mixing cement dosage,moisture content and compaction how affect lime improved soil modulus of resilience. Lime improved soil under different freezing and thawing times for micro electron microscope scanning（ SEM）,analyzed from the microscopic view,and some important conclusions are obitained.