轴向拉压荷载对水泥胶砂传输性能的影响  

Effect of axial tensile and compressive loads on transport properties of cement mortar

作　　者：王耀城[1] 王少华[1] 钟镇灏 刘伟 董必钦[1] 郭军辉[2] Wang Yaocheng Wang Shaohua Zhong Zhenhao Liu Wei Dong Biqin Guo Junhui(） College of Civil Engineering, Shenzhen University, Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen 518060, Guangdong Province, P. R. China ） No. 6 Branch, China Communications Construction Company Second Harbor Engineering Co. Ltd. , Wuhan 430000, Hubei Province, P. R. China)

机构地区：[1]深圳大学土木工程学院广东省滨海土木工程耐久性重点实验室,广东深圳518060 [2]中交第二航务工程局有限公司第六工程分公司,湖北武汉430000

出　　处：《深圳大学学报（理工版）》2017年第4期408-414,共7页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(51408366;51520105012;51478271);深圳大学新引进教师科研启动资助项目(201546);深圳市科技创新委资助项目(JCYJ20150324141711682)~~

摘　　要：采用轴向拉伸与压缩的方式,对混凝土最重要的组分水泥胶砂施加非破坏性的不同级别的荷载,研究在持续荷载作用下材料受力与碳化和氯离子侵蚀速度之间的关系.结果表明,在试验研究的应力区间内,拉压(应力)分别增加(降低)了碳化和氯离子侵蚀速度;应力对氯离子传输速率的影响比对碳化的影响更加明显;相对非破坏性的拉力荷载,压力荷载对材料的传输系数可能会产生相对较大的影响.Different degree of axial non-destructive compressive and tensile loadings are applied on cement mortar to study the influence of continuous loading on speed of carbonation and chloride ingress. Results show that within the range of the applied forces,compressive or tensile loading decreases or increases the ingress speed of CO2 and Cl^-,respectively. Comparing with that for carbonation,influence of loading on speed of Cl^-ingress is more obvious. In comparison to that of tensile loading,compressive force may lead to more significant impact on transport properties.

关 键 词：结构工程 防灾减灾工程 砂浆 轴向拉压荷载 碳化 氯离子侵蚀 多相 传输模型 

分 类 号：TU502[建筑科学—建筑技术科学]