基于粉煤灰掺量的砂浆塑性收缩开裂本构关系的研究  

Research on Influence of Fly Ash Admixture to the Constitutive Equation of Plastic Shrinkage Cracking of Cement Mortar

作　　者：马一平[1] 郭建平[1] 杨晓杰[1] 李国友[2] 朱蓓蓉[1] 

机构地区：[1]同济大学先进土木工程材料教育部重点实验室,上海201804 [2]中国建筑股份有限公司技术中心,北京101300

出　　处：《粉煤灰综合利用》2013年第6期7-9,共3页Fly Ash Comprehensive Utilization

基　　金：国家重点基础研究发展计划(973计划:2009CB623104-5);"中央高校基本科研业务费专项资金"(0500219143)

摘　　要：研究了粉煤灰掺量对于砂浆塑性收缩性能和塑性粘度的影响。试验表明,随着粉煤灰掺量的增加,砂浆抗裂指数增大,开裂所需时间增加,塑性粘度降低;建立了粉煤灰掺量与砂浆抗裂指数、开裂时间的本构关系,及掺加粉煤灰后砂浆塑性粘度与抗裂指数的本构关系。The influence of fly ash admixture to plastic shrinkage cracking and plastic viscosity of cement mortar is studied. Results show that with the increase of fly ash admixture, both cracking-resistance index and time for cracking of cement mortar increase, and its plastic viscosity de- creases. The constitutive relations between content of fly ash and cracking-resistance index of cement mortar, content of fly ash and time for crack- ing of cement mortar, and plastic viscosity of cement mortar with fly ash and its cracking-resistance index have been built respectively.

关 键 词：粉煤灰 水泥砂浆 塑性收缩开裂 塑性粘度 本构关系 

分 类 号：TU432.1[建筑科学—岩土工程]