| 水泥砂浆塑性收缩开裂预警机制的初步建立 |
| |
| 引用本文： | 马一平,马正航,张乐,余少同,杨晓杰.水泥砂浆塑性收缩开裂预警机制的初步建立[J].建筑材料学报,2019,22(6):839-845. |
| |
| 作者姓名： | 马一平 马正航 张乐 余少同 杨晓杰 |
| |
| 作者单位： | 同济大学先进土木工程材料教育部重点实验室，上海201804,同济大学先进土木工程材料教育部重点实验室，上海201804,汉高粘合剂有限公司，上海201203,同济大学先进土木工程材料教育部重点实验室，上海201804,同济大学先进土木工程材料教育部重点实验室，上海201804 |
| |
| 基金项目： | “十三五”国家重点研发计划资助项目（2016YFB0303200） |
| |
| 摘 要： | 针对水泥砂浆塑性收缩开裂的问题,基于平板法和八字模法,分别对不同水灰比和灰砂比的水泥砂浆,改变其环境参数与聚乙烯醇(PVA)纤维参数,测试其塑性抗拉强度、塑性毛细管收缩应力及失水蒸发速率,通过在室内建立的水泥砂浆塑性收缩开裂本构方程,对水泥砂浆塑性收缩开裂预警机制的建立进行了探索.结果表明:室内建立的基准水泥砂浆抗裂指数基于失水蒸发速率的一元本构方程及掺纤维水泥砂浆的三元本构方程可有效预测室外环境下水泥砂浆的塑性收缩开裂,由此初步建立了水泥砂浆塑性收缩开裂预警机制.
|
| 关 键 词： | 水泥砂浆 塑性收缩开裂 本构方程 预警机制 聚乙烯醇纤维 |
| 收稿时间： | 2018/11/6 0:00:00 |
| 修稿时间： | 2019/1/27 0:00:00 |
Preliminary Establishment of Early Warning Mechanism for Plastic Shrinkage Cracking of Cement Mortar |
| |
| MA Yiping,MA Zhenghang,ZHANG Le,YU Shaotong and YANG Xiaojie.Preliminary Establishment of Early Warning Mechanism for Plastic Shrinkage Cracking of Cement Mortar[J].Journal of Building Materials,2019,22(6):839-845. |
| |
| Authors: | MA Yiping MA Zhenghang ZHANG Le YU Shaotong and YANG Xiaojie |
| |
| Affiliation: | Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China,Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China,Henkel Adhesive Co., Ltd., Shanghai 201203, China,Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China and Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China |
| |
| Abstract: | According to the problem of plastic shrinkage cracking of cement mortar, based on the flat plate method and the eight word model method, the cement mortar of different water cement ratio and lime soil ratio was changed, and the environmental parameters and polyvinyl alcohol (PVA) fiber parameters were changed to test the plastic tensile strength. Plastic capillary shrinkage stress and water loss evaporation rate were explored by the plastic shrinkage cracking constitutive equation of cement mortar established in the laboratory. The results show that the anti crack index of built up standard mortar is based on the unitary constitutive equation of water loss evaporation rate and the ternary constitutive equation of fiber blending, which can effectively predict the plastic shrinkage cracking of cement mortar in outdoor environment, thus preliminarily establishing early warning mechanism for plastic shrinkage cracking of cement mortar. |
| |
| Keywords: | cement mortar plastic shrinkage cracking constitutive equation early warning mechanism polyvinyl alcohol(PVA) fiber |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《建筑材料学报》浏览原始摘要信息 |
|
点击此处可从《建筑材料学报》下载全文 |
|
