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Effects of Fly Ash and Hexadecyltrimethoxysilane on the Compressive Properties and Water Resistance of Magnesium Oxychloride Cement

The application of magnesium oxychloride cement (MOC) is promising, but its poor water resistance seriously hinders its development and application. In this paper, we describe a new type of MOC with excellent water resistance, prepared using fly ash and hexadecyltrimethoxysilane (HDTMS). SEM, XRD, F...

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Detalles Bibliográficos
Autores principales: Guan, Bowen, He, Zhenqing, Wei, Fulu, Wang, Faping, Yu, Jincheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9823376/
https://www.ncbi.nlm.nih.gov/pubmed/36616521
http://dx.doi.org/10.3390/polym15010172
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author Guan, Bowen
He, Zhenqing
Wei, Fulu
Wang, Faping
Yu, Jincheng
author_facet Guan, Bowen
He, Zhenqing
Wei, Fulu
Wang, Faping
Yu, Jincheng
author_sort Guan, Bowen
collection PubMed
description The application of magnesium oxychloride cement (MOC) is promising, but its poor water resistance seriously hinders its development and application. In this paper, we describe a new type of MOC with excellent water resistance, prepared using fly ash and hexadecyltrimethoxysilane (HDTMS). SEM, XRD, FTIR, TG/DSC, and other microscopic-scale studies were conducted to investigate the mechanism underlying the water-resistance enhancement of the new MOC. It was found that adding 20% fly ash and 3% HDTMS can strengthen the water resistance of MOC while retaining high mechanical properties. In particular, the residual coefficient remained at 0.91 after 7 days of immersion. This is because these two additives, when used together, can increase the content of the gelling 5-phase of MOC, as well as optimize the pore structure of MOC.
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spelling pubmed-98233762023-01-08 Effects of Fly Ash and Hexadecyltrimethoxysilane on the Compressive Properties and Water Resistance of Magnesium Oxychloride Cement Guan, Bowen He, Zhenqing Wei, Fulu Wang, Faping Yu, Jincheng Polymers (Basel) Article The application of magnesium oxychloride cement (MOC) is promising, but its poor water resistance seriously hinders its development and application. In this paper, we describe a new type of MOC with excellent water resistance, prepared using fly ash and hexadecyltrimethoxysilane (HDTMS). SEM, XRD, FTIR, TG/DSC, and other microscopic-scale studies were conducted to investigate the mechanism underlying the water-resistance enhancement of the new MOC. It was found that adding 20% fly ash and 3% HDTMS can strengthen the water resistance of MOC while retaining high mechanical properties. In particular, the residual coefficient remained at 0.91 after 7 days of immersion. This is because these two additives, when used together, can increase the content of the gelling 5-phase of MOC, as well as optimize the pore structure of MOC. MDPI 2022-12-29 /pmc/articles/PMC9823376/ /pubmed/36616521 http://dx.doi.org/10.3390/polym15010172 Text en © 2022 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
Guan, Bowen
He, Zhenqing
Wei, Fulu
Wang, Faping
Yu, Jincheng
Effects of Fly Ash and Hexadecyltrimethoxysilane on the Compressive Properties and Water Resistance of Magnesium Oxychloride Cement
title Effects of Fly Ash and Hexadecyltrimethoxysilane on the Compressive Properties and Water Resistance of Magnesium Oxychloride Cement
title_full Effects of Fly Ash and Hexadecyltrimethoxysilane on the Compressive Properties and Water Resistance of Magnesium Oxychloride Cement
title_fullStr Effects of Fly Ash and Hexadecyltrimethoxysilane on the Compressive Properties and Water Resistance of Magnesium Oxychloride Cement
title_full_unstemmed Effects of Fly Ash and Hexadecyltrimethoxysilane on the Compressive Properties and Water Resistance of Magnesium Oxychloride Cement
title_short Effects of Fly Ash and Hexadecyltrimethoxysilane on the Compressive Properties and Water Resistance of Magnesium Oxychloride Cement
title_sort effects of fly ash and hexadecyltrimethoxysilane on the compressive properties and water resistance of magnesium oxychloride cement
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9823376/
https://www.ncbi.nlm.nih.gov/pubmed/36616521
http://dx.doi.org/10.3390/polym15010172
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