废木灰处理红黏土的水力性能研究

Hydro-mechanical Behavior of Red Clay Treated by Waste Wood Ash

由于具有较低的渗透性和中等压缩性,红黏土也被用做垃圾填埋场的衬垫材料。通过不同废木灰掺入比对红黏土改性,研究了不同击实能条件下红黏土及其改性后的水力性能。结果表明废木灰掺入量对该红黏土液塑限指数的影响并不大;随着击实能的减小或废木灰掺入比的增大,红黏土的最优含水量增大;轻型和中型击实的红黏土随着废木灰参入比的增大渗透系数随之增大;废木灰掺入比的增加对土样体积收缩影响明显,同时显著改变了红黏土土样的均一性。

Due to low permeability and moderate compression, the red clay is also used as liner material for landfill. The red clay was modified by different mixing ratio of waste wood ash, the hydro- mechanical behavior of red clay under different compaction energy was studied in this work. The results show that the increasing of the ratio of waste wood ash has insignificant effects on the liquid limit and plastic limit of this red clay. Optimum water content is increased with a decrease of compaction energy or increase ratio of waste wood ash. The permeability coefficient increases with waste wood ash ratio increased of light and medium compaction red clay. The waste wood ash significantly affected the soil volume shrinkage and the red clay soil uniformity was changed by the waste wood ash.