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Research on Salt Corrosion Resistance of Lithium-Based Protective Coating on Mortar Substrate

The present study concerns hydrophobic surface treatments with silane-based coating on concrete surfaces against external ionic transport. The nano-modification and organic–inorganic modification were carried out on it and applied to the mortar matrix and concrete matrix. Lithium-based protective co...

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Autores principales: Zang, Jiawei, Pan, Chonggen, Li, Xu, Chen, Keyu, Chen, Danting
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10179878/
https://www.ncbi.nlm.nih.gov/pubmed/37176344
http://dx.doi.org/10.3390/ma16093463
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author Zang, Jiawei
Pan, Chonggen
Li, Xu
Chen, Keyu
Chen, Danting
author_facet Zang, Jiawei
Pan, Chonggen
Li, Xu
Chen, Keyu
Chen, Danting
author_sort Zang, Jiawei
collection PubMed
description The present study concerns hydrophobic surface treatments with silane-based coating on concrete surfaces against external ionic transport. The nano-modification and organic–inorganic modification were carried out on it and applied to the mortar matrix and concrete matrix. Lithium-based protective coating (PC1, PC2), nano-modified coating (NC1, NC2) and organic–inorganic composite coating (OL1) were prepared. The salt erosion resistance of the mortar matrix and concrete matrix was tested, compared with the blank group and the market. The test results found that the organic–inorganic modified OL1 and LC1 coatings have the greatest influence on the chloride penetration resistance of the mortar matrix, in which the chloride penetration depth of 28 days is reduced by 73.03% and 63.83%, respectively, compared with the blank group. The rate of mass change of the blank group, PC1 and PC2 coatings, and NL1 and NL2 coatings were 0.17%, 0.08%, and 0.03%, respectively. The result demonstrated that the lithium-based coating could effectively delay the penetration rate of chloride ions and sulfates into the mortar, and the nano-modified properties could improve the salt resistance. The scanning electron microscopy (SEM) showed that coating treatment would promote the secondary hydration of cement-based materials, by reducing the content of [Formula: see text] in hydration products of cement-based materials and producing C-S-H gel, which is conducive to strength enhancement and pore refinement. The nano-component would promote the reaction degree, while the organic–inorganic coating would have the respective advantages of the two components.
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spelling pubmed-101798782023-05-13 Research on Salt Corrosion Resistance of Lithium-Based Protective Coating on Mortar Substrate Zang, Jiawei Pan, Chonggen Li, Xu Chen, Keyu Chen, Danting Materials (Basel) Article The present study concerns hydrophobic surface treatments with silane-based coating on concrete surfaces against external ionic transport. The nano-modification and organic–inorganic modification were carried out on it and applied to the mortar matrix and concrete matrix. Lithium-based protective coating (PC1, PC2), nano-modified coating (NC1, NC2) and organic–inorganic composite coating (OL1) were prepared. The salt erosion resistance of the mortar matrix and concrete matrix was tested, compared with the blank group and the market. The test results found that the organic–inorganic modified OL1 and LC1 coatings have the greatest influence on the chloride penetration resistance of the mortar matrix, in which the chloride penetration depth of 28 days is reduced by 73.03% and 63.83%, respectively, compared with the blank group. The rate of mass change of the blank group, PC1 and PC2 coatings, and NL1 and NL2 coatings were 0.17%, 0.08%, and 0.03%, respectively. The result demonstrated that the lithium-based coating could effectively delay the penetration rate of chloride ions and sulfates into the mortar, and the nano-modified properties could improve the salt resistance. The scanning electron microscopy (SEM) showed that coating treatment would promote the secondary hydration of cement-based materials, by reducing the content of [Formula: see text] in hydration products of cement-based materials and producing C-S-H gel, which is conducive to strength enhancement and pore refinement. The nano-component would promote the reaction degree, while the organic–inorganic coating would have the respective advantages of the two components. MDPI 2023-04-29 /pmc/articles/PMC10179878/ /pubmed/37176344 http://dx.doi.org/10.3390/ma16093463 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zang, Jiawei
Pan, Chonggen
Li, Xu
Chen, Keyu
Chen, Danting
Research on Salt Corrosion Resistance of Lithium-Based Protective Coating on Mortar Substrate
title Research on Salt Corrosion Resistance of Lithium-Based Protective Coating on Mortar Substrate
title_full Research on Salt Corrosion Resistance of Lithium-Based Protective Coating on Mortar Substrate
title_fullStr Research on Salt Corrosion Resistance of Lithium-Based Protective Coating on Mortar Substrate
title_full_unstemmed Research on Salt Corrosion Resistance of Lithium-Based Protective Coating on Mortar Substrate
title_short Research on Salt Corrosion Resistance of Lithium-Based Protective Coating on Mortar Substrate
title_sort research on salt corrosion resistance of lithium-based protective coating on mortar substrate
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10179878/
https://www.ncbi.nlm.nih.gov/pubmed/37176344
http://dx.doi.org/10.3390/ma16093463
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