混凝土表面热喷涂陶瓷防护涂层的可行性试验研究

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Abstract In response to the urgent need for durability protection of cement concrete, the innovation of thermal spraying technology is introduced into the field of concrete surface protection. Through the preliminary test of coating adhesion and microstructure, the feasibility of plasma thermal spraying ceramic coating on concrete surface was verified by experiment. The results show that the instantaneous high temperature of the thermal spray process will not damage the concrete matrix. The thickness of the coating was 0.3 mm, and its surface was relatively uniform, but it still needs to be sealed twice to ensure the impermeability and frost resistance of the concrete. The thermal spray coating and the concrete matrix have good interface bonding, with an average adhesion of 3.88 MPa, which exceeds the tensile strength of the matrix itself. The coating relied on phy-sical grasping to bond the substrate, whose microstructure was relatively dense without obvious voids or defects. The research aims to broaden the application field of thermal spraying and the technical system of concrete functional protective coating materials, and improve the comprehensive protection capabilities of concrete in terms of wear resistance, corrosion protection and thermal protection.

Key words： plasma thermal spraying concrete protective coating interface bonding microstructure

Published: 16 July 2021

CLC number:

TU52

Fund:Central Non-Profit Scientific Research Fund for Institutes (CKSF2019374/CL,CKSF2019394/GC)and the National Natural Science Foundation of China (U2040222,51779019).

About author:: Shi Yan is the professor-level senior engineer at the Institute of Materials and Structures, Yangtze River Scientific Research Institute. She received his Ph.D.degree from the University of Wuhan in June 2007. And she commitment to the basic theory and application of cement-based materials, preparation and performance control of high-performance concrete, cracking mechanism and control of concrete, development and resource utilization of industrial solid waste, long-term performance evolution and durability improvement of hydraulic concrete. As the project leader or main participant, she has completed more than 30 scientific research projects at the national, provincial and ministerial levels or water resources and hydropower engineering. Co-published 2 monographs, participated in the compilation of more than 10 industry standards, published more than 50 papers, and obtained more than 10 national patents and 3 provincial and ministerial scientific and technological progress awards.

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	SHI Yan
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Cite this article:

SHI Yan,LI Jiazheng,LI Yang, et al. Feasibility Test Study of Thermal Spraying Ceramic Protective Coating on Concrete Surface[J]. Materials Reports, 2021, 35(Z1): 238-241.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2021/V35/IZ1/238

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