【摘要】 将天然浮石粉作为外掺剂应用于水泥土改性研究,以粉质黏土为原料,首先对水泥质量分数16%、土体原始含水量为击实试验最佳含水量时的试件进行了不同龄期(7d、28d、60d)、不同浮石粉掺量(4%、8%、12%、16%)的无侧限抗压强度试验,结果表明,随着龄期增长,浮石粉水泥土强度增大,随浮石粉掺量增加,强度先增大后减小,浮石粉最佳掺量为8%。其次对水泥质量分数为16%、浮石粉质量分数为8%、土料原始含水量分别为14%、19%、24%、29%的试块进行无侧限抗压强度试验,结果表明,浮石粉可明显改善原始含水量较高土体的强度,当原始土料含水量高于最优含水量达到19%时,浮石粉水泥复合土强度平均提高了18.3%。更多还原

【Abstract】 With pumice as the additive agent used in cement composite soil,in order to test the strength of the composite cement soil,the unconfined compression resistance were tested in the lab with different additive quantity(4%,8%,12%,16%),different curing periods(7 d,28 d,60 d),the results show that the strengths of the composite cement soil increase with increasing curing periods,with increasing additive quantity the strengths of the composite cement soil firstly add,and then reduce,there is an optimum pumice powder amount 8%.The pumice powder may evidently improve the mechanical properties of soft soil which has the characteristic of rich-water content,when water content is 19%,the strength of the composite cement soil increase about 18.3% averagely.更多还原