Experimental Study on the Improvement of Expansive Soil with Admixtures
Taking weak expansive soil in the Jianghuai area as the research object and selecting the total swelling-shrinkage percentage as the evaluation index,this paper studies the impact of the improvement effect of the four modified materials of cement,lime,basalt fiber and curing agent on expansive soil,and also studies the shearing strength of cement and lime improving expansive soil.The test results show that with the increase of admixture con-tent,the total expansion and contraction rate of improved soil decreases gradually with a slowing trend,that under the same dosage,the modification effect of lime is better than that of cement,and the modification effect of curing agent and basalt fiber is not obvious,that with the increase of admixture content,the cohesion and internal friction angle of improved soil gradually increase with a slowing trend,and that under the same dosage,the shearing perfor-mance of lime-modified soil is better than that of cement-modified soil.
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