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Effect of rust inhibitors and surface strengthening materials on service life of marine RC structures

Haiwei Zhu (Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Hongfa Yu (Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Haiyan Ma (Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Bo Da (Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Qiquan Mei (Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 14 June 2021

Issue publication date: 2 July 2021

88

Abstract

Purpose

The purpose of this paper is to compare the effect of rust inhibitors and surface strengthening materials on the service life of RC structures in tropical marine environments and ultimately to provide basis and recommendations for the durability design of reinforced concrete (RC) structures.

Design/methodology/approach

Slag concrete specimens mixed with four kinds of rust inhibitors and coated with four kinds of surface strengthening materials were corroded by seawater exposure for 365 days, and the key parameters of chloride ion diffusion were obtained by testing. Then a new service life prediction model, based on the modified model for chloride ion diffusion and reliability theory, was applied to analyze the effect of rust inhibitors and surface strengthening materials on the service life of RC structures in tropical marine environments.

Findings

Rust inhibitors and surface strengthening materials can effectively extend the service life of RC structures through different effects on chloride ion diffusion behavior. The effects of rust inhibitors and surface strengthening materials on the service life extension of RC structures adhered to the following trend: silane material > cement-based permeable crystalline waterproof material > hydrophobic plug compound > spray polyurea elastomer > water-based permeable crystalline waterproof material > calcium nitrite > preservative > amino-alcohol composite.

Originality/value

Using a new method for predicting the service life of RC structures, the attenuation law of the service life of RC structures under the action of rust inhibitors and surface strengthening materials in tropical marine environments is obtained.

Keywords

Acknowledgements

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No.11832013, 51878350, 51678304).

Citation

Zhu, H., Yu, H., Ma, H., Da, B. and Mei, Q. (2021), "Effect of rust inhibitors and surface strengthening materials on service life of marine RC structures", Anti-Corrosion Methods and Materials, Vol. 68 No. 3, pp. 255-268. https://doi.org/10.1108/ACMM-06-2020-2336

Publisher

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Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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