不同母土对水泥土微观结构及强度的影响  

Influences of Different Parent Soils on Microstructure and Strength of Cemented Soil

作　　者：熊家归 李焱 胡松涛 廖铖 周闽 王锦辉 罗绍杨 XIONG Jiagui;LI Yan;HU Songtao;LIAO Cheng;ZHOU Min;WANG Jinhui;LUO Shaoyang(School of Civil Engineering and Architecture,Nanchang University,Nanchang 330031,China;Jiangxi Academy of Water Science and Engineering,Nanchang 330029,China;CCFED Civil Engineering Co,Ltd,Changsha 410004,China)

机构地区：[1]南昌大学工程建设学院,南昌330031 [2]江西省水利科学院,南昌330029 [3]中建五局土木工程有限公司,长沙410004

出　　处：《硅酸盐通报》2024年第5期1832-1839,共8页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(52169025);江西省科技厅“科技+水利”联合计划(2023KSG01008,2022KSG01003);江西省水利厅科技项目(202325ZDKT16,202223YBKT01)。

摘　　要：为探究多元变量组合差异下水泥土强度的变化规律,以江西省内常见的黏性土、砂性土和砂砾土为研究对象,在不同配合比方案下开展无侧限抗压强度试验,并通过SEM测试分析水泥土微观结构。试验结果表明,在母土为最优含水状态下的三种水泥土中,水泥掺入比为21%(质量分数,下同)、水灰比为0.5、土质含砂砾率为100%的水泥土抗压强度最高,其C-S-H凝胶含量较多,孔隙数量较少,砂砾基质的粒状骨架较多。In order to explore the variation law of the strength of cemented soil with different combinations of multivariate variables,unconfined compressive strength tests were carried out on the common clayey soil,sandy soil and gravelly soil in Jiangxi Province under different mix schemes,and the microstructure of cemented soil was analyzed by SEM.The results show that among the three types of cemented soil with optimal water content,the cemented soil with 21%cement inclusion ratio(mass fraction,the same below),0.5 water-cement ratio,and 100%sand and gravel content has the highest compressive strength,with more C-S-H gel content,fewer pores,and more granular skeleton in the sand and gravel matrix.

关 键 词：水泥土 水泥掺入比 水灰比 土质含砂砾率 抗压强度 微观结构 

分 类 号：TU472.6[建筑科学—结构工程]