水玻璃改良低液限粉土的室内试验研究  

Experimental study on improvement of low liquid limit silt with water glass

作　　者：姜冲[1,2] 黄珂[1,2] 杜伟[1,2] 赵子荣[1,2] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学江苏省岩土工程技术工程研究中心,江苏南京210098

出　　处：《河北工程大学学报（自然科学版）》2016年第4期42-46,共5页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：浙江省交通运输厅科技计划项目(2015J06)

摘　　要：通过对泰州地区低液限粉土进行室内改良试验,研究2.6-2.9和3.1-3.4两种不同模数水玻璃作为改良剂对该地区粉土改良效果,试验结果表明：两种水玻璃改良土的最大干密度均小于素土的最大干密度,最优含水率均大于素土的最优含水率;两种不同模数水玻璃对该地区低液限粉土的CBR值均有明显提高作用,压实度对2种改良填料土的CBR值有着不同程度的影响,随着压实度增加,CBR值呈现不同比例的增长,而且28 d龄期增长幅度远大于0 d龄期的增长幅度,不养护时增加压实度对CBR值的提高影响不大;模数3.1-3.4水玻璃改良土的早期强度要高于模数2.6-2.9的水玻璃改良土;养护相同时间情况下模数2.6-2.9水玻璃改良土强度提高更大。Through laboratory tests of low liquid limit silt in Taizhou area, 2. 6 -2. 9 and 3. 1 -3. 4 modulus of water glass were used as modifiers, and the effect of improved silt in the area was re-searched. The results show that the maximum dry density of two kinds of water glass modified soil are less than the plain soil, and the optimum moisture content is also greater than the plain soil. The CBR values of the low liquid limit silt with two kinds of water glass in the area are significantly increased, and the compaction degree has effects on the CBR value of the modified filler soil. With the increase of the compaction degree, the CBR value shows different proportion of growth. And the growth rate with 28 days is much greater than the growth rate of 0 day. The early strength of the 3 .1 -3 . 4 modu-lus water glass improved soil is higher than that of the 2. 6 -2. 9 modulus water glass improved soil. Under the same maintenance conditions,the improved soil strength of the 2. 6 -2. 9 modulus water glass improved soil is greatly improved.

关 键 词：水玻璃 加州承载比 粉土 路基 改良试验 

分 类 号：TU43[建筑科学—岩土工程]