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The Influence of Alkali Content on the Hydration of the Slag-Based Geopolymer: Relationships between Resistivity, Setting, and Strength Development

This study investigated the influence of alkali content on the early-age hydration process of slag-based geopolymer and the feasibility of non-destructive resistivity. Results showed that there existed a threshold of alkali content in adjusting the early-age hydration. Initially, increasing the alka...

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Detalles Bibliográficos
Autores principales: Fang, Yuan, Zhuang, Kunde, Zheng, Dapeng, Guo, Weitao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9920209/
https://www.ncbi.nlm.nih.gov/pubmed/36771819
http://dx.doi.org/10.3390/polym15030518
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author Fang, Yuan
Zhuang, Kunde
Zheng, Dapeng
Guo, Weitao
author_facet Fang, Yuan
Zhuang, Kunde
Zheng, Dapeng
Guo, Weitao
author_sort Fang, Yuan
collection PubMed
description This study investigated the influence of alkali content on the early-age hydration process of slag-based geopolymer and the feasibility of non-destructive resistivity. Results showed that there existed a threshold of alkali content in adjusting the early-age hydration. Initially, increasing the alkali content tended to accelerate the dissolution period (detected by resistivity and heat release rate) and resulted in a denser microstructure (detected by TEM). When the alkali content surpassed 6 wt%, the increasing alkali content mitigated the structural development of a slag-based geopolymer, as it lowered the liquid water content and caused local precipitation, which trapped the early-age ions transmission and, therefore, the later-age mechanical development was inhibited. It was proven that the resistivity acted as a linkage among the reaction degree, workability, and strength development.
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spelling pubmed-99202092023-02-12 The Influence of Alkali Content on the Hydration of the Slag-Based Geopolymer: Relationships between Resistivity, Setting, and Strength Development Fang, Yuan Zhuang, Kunde Zheng, Dapeng Guo, Weitao Polymers (Basel) Article This study investigated the influence of alkali content on the early-age hydration process of slag-based geopolymer and the feasibility of non-destructive resistivity. Results showed that there existed a threshold of alkali content in adjusting the early-age hydration. Initially, increasing the alkali content tended to accelerate the dissolution period (detected by resistivity and heat release rate) and resulted in a denser microstructure (detected by TEM). When the alkali content surpassed 6 wt%, the increasing alkali content mitigated the structural development of a slag-based geopolymer, as it lowered the liquid water content and caused local precipitation, which trapped the early-age ions transmission and, therefore, the later-age mechanical development was inhibited. It was proven that the resistivity acted as a linkage among the reaction degree, workability, and strength development. MDPI 2023-01-18 /pmc/articles/PMC9920209/ /pubmed/36771819 http://dx.doi.org/10.3390/polym15030518 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
Fang, Yuan
Zhuang, Kunde
Zheng, Dapeng
Guo, Weitao
The Influence of Alkali Content on the Hydration of the Slag-Based Geopolymer: Relationships between Resistivity, Setting, and Strength Development
title The Influence of Alkali Content on the Hydration of the Slag-Based Geopolymer: Relationships between Resistivity, Setting, and Strength Development
title_full The Influence of Alkali Content on the Hydration of the Slag-Based Geopolymer: Relationships between Resistivity, Setting, and Strength Development
title_fullStr The Influence of Alkali Content on the Hydration of the Slag-Based Geopolymer: Relationships between Resistivity, Setting, and Strength Development
title_full_unstemmed The Influence of Alkali Content on the Hydration of the Slag-Based Geopolymer: Relationships between Resistivity, Setting, and Strength Development
title_short The Influence of Alkali Content on the Hydration of the Slag-Based Geopolymer: Relationships between Resistivity, Setting, and Strength Development
title_sort influence of alkali content on the hydration of the slag-based geopolymer: relationships between resistivity, setting, and strength development
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9920209/
https://www.ncbi.nlm.nih.gov/pubmed/36771819
http://dx.doi.org/10.3390/polym15030518
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