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Article

The Effects of Various Silicate Coatings on the Durability of Concrete: Mechanisms and Implications

by
Jinfu Li
1,
Jiale Song
1,*,
Shuheng Zhang
1,
Wei Liu
1,
Zhaokuan Cui
1 and
Weiguang Li
2,*
1
School of Materials Science and Engineering, Chang’an University, Xi’an 710064, China
2
School of Highway, Chang’an University, Xi’an 710064, China
*
Authors to whom correspondence should be addressed.
Buildings 2024, 14(2), 381; https://doi.org/10.3390/buildings14020381
Submission received: 11 January 2024 / Revised: 22 January 2024 / Accepted: 29 January 2024 / Published: 1 February 2024
(This article belongs to the Section Building Materials, and Repair & Renovation)
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Abstract

Silicate solutions can improve the durability of concrete conveniently and effectively. To horizontally compare the enhancement effects of different composite silicate solutions, three types of silicate surface treatment agents were prepared by using sodium silicate, potassium silicate, and lithium silicate as the main agents, along with urea, sodium polyacrylate, catalysts, and fluoro-carbon surfactants as the adjuvants. Furthermore, their effects on the durability of concrete were compared. The results showed that silicate surface treatment could reduce the content of Ca(OH)2, increase the content of hydrated calcium silicate (C-S-H), and improve the compactness and hydrophobicity of the hardened cement surface. Although the three surface treatments enhanced the durability of concrete, the effects differed based on the complexities and mixtures. The sodium silicate compounded with potassium silicate performed the best of all three, wherein the content of the C-S-H gel increased by 389.8%, the permeability decreased by 60.6%, the water contact angle improved to 83.5° and the chloride ion resistance and freeze–thaw resistance of concrete increased by 36.7% and 37.34%, respectively, compared with the control sample.
Keywords: surface strengthening; complex silicate; concrete; durability surface strengthening; complex silicate; concrete; durability

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MDPI and ACS Style

Li, J.; Song, J.; Zhang, S.; Liu, W.; Cui, Z.; Li, W. The Effects of Various Silicate Coatings on the Durability of Concrete: Mechanisms and Implications. Buildings 2024, 14, 381. https://doi.org/10.3390/buildings14020381

AMA Style

Li J, Song J, Zhang S, Liu W, Cui Z, Li W. The Effects of Various Silicate Coatings on the Durability of Concrete: Mechanisms and Implications. Buildings. 2024; 14(2):381. https://doi.org/10.3390/buildings14020381

Chicago/Turabian Style

Li, Jinfu, Jiale Song, Shuheng Zhang, Wei Liu, Zhaokuan Cui, and Weiguang Li. 2024. "The Effects of Various Silicate Coatings on the Durability of Concrete: Mechanisms and Implications" Buildings 14, no. 2: 381. https://doi.org/10.3390/buildings14020381

APA Style

Li, J., Song, J., Zhang, S., Liu, W., Cui, Z., & Li, W. (2024). The Effects of Various Silicate Coatings on the Durability of Concrete: Mechanisms and Implications. Buildings, 14(2), 381. https://doi.org/10.3390/buildings14020381

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