一种测试硬化水泥浆体自应力的新方法——波形管法  

New method of measuring autogenous strain of hardening cement paste:the corrugated mold system

作　　者：马先伟[1,2] 王培铭[2] 蔡锐锋 

机构地区：[1]平顶山工学院,河南平顶山467001 [2]同济大学混凝土材料国家重点实验室,上海200092 [3]双东混凝土有限公司,安徽宣城242000

出　　处：《混凝土》2009年第3期9-12,共4页Concrete

摘　　要：波形管法集合了传统的体积法和线性法的优点,而避免了它们的缺点,成为国际上测试硬化浆体或混凝土自应力的新方法,因此详细地介绍了它所用的器材和试验方法,并进行验证。所得的试验结果与其他研究者的结果一致,即粉煤灰减小了低水灰比硬化浆体的自应变,而硅灰增加了自应变;AFt型膨胀剂、减缩剂和超吸水剂能不同程度的减小硅灰引起的自应变,但减缩剂效果较好,而超吸水剂与其掺量有关。An international new, sealed, flexible corrugated mold system combines the advantages of linear and volumetric measurement of autogenous strain of hardening cement paste or concrete, while avoiding most of their disadvantages.Its instruments and testing method were intro- duced in detail.The results obtained with the corrugated mold system agree with those of other researcher.Namely, fly ash reduced the aotogenous strain of cement paste during hardening for a low water-cementitious materials ratio system, while silica fume increased the autogenous strain;Et- tringite-type expansive agent, shrinkage reducing agent and superabsorbent polymer reduced the strain induced by silica fume to different extents. In comparison, shrinkage reducing agent has the best effect, while the effect of superabsorbent polymer is related to its amount added.

关 键 词：自应变 波形管法 硬化水泥浆体 

分 类 号：TU528.07[建筑科学—建筑技术科学]