摘要
三合土在工程中广泛应用,其抗剪强度受配合比和含水率影响显著。本文旨在考虑三合土不同配合比及不同含水率对三合土抗剪强度的影响。文中的三合土是用石灰、粘土和砂按照一定体积比配合而成,配合比为:1:3:6、1:3:3、1:2:3、1:2:4,同一个配合比下有11%、13%、15%、17%、19%五种含水率,经过室内击实试验制作出试件,并对试件进行直接剪切试验。由于配合比为1:2:3的三合土粘聚力在含水率14%时取得最大值为81.16kPa,所以在该含水率时此种配合比的三合土抗剪强度最大。因此,三合土的最佳配合比为1:2:3。
Tabia is widely used in engineering. Shear strength is influenced by mix ratio and moisture content significandy. Influence of shear strength of tabia by mix ratio and moisture content is studied. The tabia is of lime, clay and sand formed in accordance with a certain volume ratio, 1：3：6, 1：3：3, 1：2：3, 1：2：4 . It has moisture content of 11%, 13%, 15%, 17%, 19% under the condition of the same mix ratio. Indoor samples were produced by compaction test , and they were used for direct shear test. When moisture content of tabia is 14% , cohesive strength of tabia with the mix ratio of 1：2：3 is 81.6kpa which is max. So shear strength of the tabia is of maximum in such mix ratio and moisture content. Therefore, the best mix ratio of tabia is 1：2：3.
出处
《内蒙古农业大学学报（自然科学版）》
北大核心
2013年第4期119-122,共4页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
内蒙古农业大学博士基金项目(BJ07-67)
关键词
三合土
配合比
含水率
抗剪强度
Tabia
mix ratio
moisture content
shear strength
