Interface bonding performance and enhancement mechanism of in-situ polymerization modified mortar under wet environments

被引：1
|
作者：
Shao L. [1 ]
Feng P. [1 ,2 ]
Liu M. [1 ]
Wang W. [2 ]
Hong J. [2 ]
Miao C. [1 ,2 ]
机构：
[1] School of Materials Science and Engineering, Southeast University, Nanjing
[2] State Key Laboratory of High Performance Civil Engineering Materials, Nanjing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2023年 / 53卷 / 05期
关键词：
in-situ polymerization; interface bonding performance; repairing mortars; wet environment;
D O I：
10.3969/j.issn.1001-0505.2023.05.001
中图分类号：
学科分类号：
摘要：
To improve the repair effect of cement-based materials under wet environment,organic monomers, initiators and crosslinkers were added to the cement-based repairing mortars for in-situ polymerization in it. The bonding strength tests were used to explore the influence of in-situ polymerization modified mortar on the dry and wet interface bonding properties. Meanwhile,the workability mortar was investigated by flowability tests and setting time tests. Results show that in-situ polymerization modified mortar possess good workability and short setting time and can significantly enhance the interfacial bonding properties of mortar with matrix. Compared with the blank group,its wet and dry interface bonding strengths are increased by up to 3. 7 times and 13. 0 times at 28 d. Moreover,the bonding strength of the wet interface is up to 1. 6 times that of the dry interface due to the anchoring action of polymers at the wet interface after polymerization,indicating the good repair effect of in-situ polymerization modified mortar under wet environment. © 2023 Southeast University. All rights reserved.
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页码：749 / 755
页数：6
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