砂质粉土水泥土无侧限抗压强度试验  

Experimental research on unconfined compressive strength of sandy silt cement soil

作　　者：姚贤华[1,2] 管俊峰[2] 谢超鹏 韩霄羽 

机构地区：[1]长安大学公路学院,西安710064 [2]华北水利水电大学土木与交通学院,郑州450011

出　　处：《南水北调与水利科技》2016年第2期125-130,共6页South-to-North Water Transfers and Water Science & Technology

基　　金：国家自然科学基金青年基金(51209094);海岸和近海工程国家重点实验室基金(LP1211);河南省高等学校青年骨干教师资助计划项目(2013GGJS-084)~~

摘　　要：通过对36组水泥土室内配方试验的归纳与分析,进行了室内4种因素影响下水泥土的无侧限抗压强度试验,定量分析了水泥掺量、养护龄期、水泥品种和养护方式对水泥土无侧限抗压强度的影响,揭示了各种因素对水泥土无侧限抗压强度的影响规律。试验结果表明:水泥土无侧限抗压强度随着龄期的增长而提高;水泥掺量、水泥品种和养护龄期是影响水泥土无侧限抗压强度的主要因素;对于水泥掺量小于10%的水泥土,养护方式对水泥土强度影响较大。试验结果还表明:无侧限抗压强度试验中的应力应变关系随水泥掺量的变化以及龄期都有较明显的变化趋势,水泥土试样随龄期的增长和水泥掺量的增加均变得越硬越脆,龄期越长、水泥掺量越大,应力应变关系曲线在上升段越陡峭。最后,从扫描电镜(SEM)试验照片中可以直观的看出水泥土随着水泥掺量的增加强度的变化规律。Based on the generalization and analysis of laboratory experimental results from 36 groups of cement soil,the influences of various factors（e.g.cement content,curing time,types of cement,curing conditions）on the mechanical properties of unconfined compressive strength of cement were presented.Our results showed that the unconfined compressive strength of cement soil increases with the growing curing time,and it is deeply affected by the cement content,cement types and curing time,Greater effects of curing conditions were observed when the cement content was below 10%.Moreover it is shown that the stress-strain response with the cement content and curing time of the cement soil.Increasement of curing time and cement content makes the cement soil harder and brittler;In addition,with the longer curing time,cement content is greater,and the stressstrain relationship curve in the ascent is steep.Finally,change mechanism of the cement soil strength can be seen intuitively from the scanning electron microscope（SEM）photos with the increasing of cement content.

关 键 词：水泥土 无侧限抗压强度 水泥掺量 龄期 养护方式 水泥品种 应力应变 

分 类 号：TU472[建筑科学—结构工程]