Experimental Study on Water Stability of Lime and Cement Modified Silty Clay
In order to investigate the water stability of improved silty clay by lime and cement,modified silty clay samples with different lime and cement dosages were designed and prepared.The disintegration tests were conducted by a self-made disintegrator.The experimental results show that the plain silty clay samples without added modifiers will rapidly disintegrate after immersion in water,and the disintegration process has obvious stages.When the lime content is less than 6％,the improved silty clay sample will disintegrate in water,but its resistance to collapse will increase with the increase of lime content and compaction degree.When the lime content is 6％and the cement con-tent 2％,the improved silty clay sample will not disintegrate in water,but water will still infiltrate into the interior of the sample.At this time,the water stability of the sample can be described by the infiltration rate.The infiltration rate of improved silty clay samples will decrease with the increase of compaction degree;Under the same com-paction degree,the infiltration rate of improved silty clay samples decreases with the increase of the amount of mod-ifier.The water stability improvement effect of cement modified silty clay is better than that of lime modified silty clay with the same dosage.The improvement effect of cement is equivalent to adding 2％more lime,but the cement dosage should not be less than 2％.
国家科技期刊平台
NSTL
万方数据
