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

Autor: Yuan Fang, Kunde Zhuang, Dapeng Zheng, Weitao Guo
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Polymers, Vol 15, Iss 3, p 518 (2023)
Druh dokumentu: article
ISSN: 2073-4360
18569013
DOI: 10.3390/polym15030518
Popis: 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.
Databáze: Directory of Open Access Journals
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