Resistance to sulfate attack of magnesium phosphate cement-coated concrete

被引：47

作者：

Li Jun ^{[1
,2
,3
]}

Ji Yongsheng ^{[1
,3
]}

Zhang Linglei ^{[1
,3
]}

Liu Benlin ^{[1
,3
]}

机构：

[1] China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221008, Jiangsu, Peoples R China

[2] Kaifeng Univ, Sch Civil Engn & Architecture, Kaifeng 475004, Henan, Peoples R China

[3] China Univ Min & Technol, Sch Mech & Civil Engn, Xuzhou 221008, Jiangsu, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 195卷

关键词：

Magnesium phosphate; Coating; Sulfate; Corrosion; Protection; RAPID REPAIR; DURABILITY; PERFORMANCE; MORTAR; BINDER;

D O I：

10.1016/j.conbuildmat.2018.11.071

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The resistance to sulfate attacks of uncoated, magnesium phosphate cement (MPC)-coated, and epoxy-coated concretes has been studied by comparing changes in their compressive strengths, appearances, and ultrasonic velocities. XRD and scanning electron microscopy microanalysis have been conducted for the MPC-coated concrete before and after etching, and the intrinsic mechanism of the effect of MPC coating on the resistance of concrete to sulfate has been investigated. Results show that the structure and composition of MPC coating change in a sulfate erosion environment. And the coating is more closely bonded to the concrete and the structure is more compact than in other environments. MPC coating can significantly improve the erosion resistance of the concrete to sulfate in a manner that is superior to epoxy coating. So MPC coating has a significant protective effect on concrete against sulfate corrosion. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：156 / 164

页数：9

共 30 条

[1]

[Anonymous], 1762008 GBT

[2] Diffusion-reaction model for the internal sulfate attack in concrete [J].

Campos, A. ;

Lopez, C. M. ;

Aguado, A. .

CONSTRUCTION AND BUILDING MATERIALS, 2016, 102 :531-540

[3] Degradation progress of concrete subject to combined sulfate-chloride attack under drying-wetting cycles and flexural loading [J].

Chen, Fei ;

Gao, Jianming ;

Qi, Bing ;

Shen, Daman ;

Li, Luyang .

CONSTRUCTION AND BUILDING MATERIALS, 2017, 151 :164-171

[4]

[丁铸 Ding Tao], 2006, [材料研究学报, Chinese Journal of Materials Research], V20, P141

[5]

Ding Z., 2005, RES MAGNESIUM PHOSPH, P253

[6] Magnesium Phosphate Cements formulated with a low-grade MgO by-product: Physico-mechanical and durability aspects [J].

Formosa, J. ;

Lacasta, A. M. ;

Navarro, A. ;

del Valle-Zermeno, R. ;

Niubo, M. ;

Rosell, J. R. ;

Chimenos, J. M. .

CONSTRUCTION AND BUILDING MATERIALS, 2015, 91 :150-157

[7]

Hongyi J., 2010, J WUHAN UNIV TECHNOL, V32, P37

[8] Influence of clinker sulfate on cement paste external sulfate attack [J].

Horkoss, Sayed ;

Julien, Simone ;

Escadeillas, Gilles ;

Lteif, Roger ;

Rizk, Toufic .

ADVANCES IN CEMENT RESEARCH, 2013, 25 (04) :217-224

[9]

Jianming Yang, China invention patent, Patent No. [ZL 2015104528590, 201504528590]

[10] Macroscopic and microscopic fracture features of concrete used in coal mine under chlorine salt erosion [J].

Li Bing ;

Yin Huiguang ;

Mao Xianbiao ;

Li Yan ;

Zhang Lianying ;

Liu Ruixue ;

Qiu Peitao .

INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY, 2016, 26 (03) :455-459

← 1 2 3 →