Relative Method for Evaluating Freeze-Thaw Damage of Coated Concrete

被引：0

作者：

Zhang C. ^{[1
]}

Li W. ^{[1
]}

Fan J. ^{[1
]}

Xun W. ^{[2
]}

Chen Y. ^{[3
]}

机构：

[1] Civil and Architectural Engineering College, Dalian University, Dalian

[2] Architectural Research and Design Institute Co., Ltd., Dalian

[3] School of Materials Science and Engineering, North Minzu University, Yinchuan

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2020年 / 23卷 / 03期

关键词：

Concrete; Damage layer; Freeze-thaw cycles; Pore structure; Protect coating; Relative method;

D O I：

10.3969/j.issn.1007-9629.2020.03.009

中图分类号：

学科分类号：

摘要：

The dynamic elastic modulus of epoxy mortar coating, polyurethane coating, polyurea coating and concrete with coating were calculated by using the relative method. The damage evolution law of the damage layer and the internal structure of concrete was analyzed. The results of the relative method were verified by the scanning electron microscopy(SEM) and the mercury intrusion test. The results show that effectivness of the frost resistance of the three coatings is in the following order: epoxy mortar coating>polyurethane coating>polyurea coating; the dynamic elastic modulus of the surface layer of concrete members is the lowest, and the freeze-thaw damage and erosion are the most serious; the dynamic elastic modulus of the inner layer of concrete members is the highest, which is basically not eroded; the dynamic elastic modulus of damaged layer of concrete members increases from surface to inside and then changes smoothly; the decrease of dynamic modulus of elasticity of concrete members are caused by the increase of the proportion of harmful holes. © 2020, Editorial Department of Journal of Building Materials. All right reserved.

引用

页码：546 / 551

页数：5

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