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Effect of Curing Temperature on High-Strength Metakaolin-Based Geopolymer Composite (HMGC) with Quartz Powder and Steel Fibers

Geopolymer is a new type of synthesized aluminosilicate material. Compared with ordinary Portland cement, it has better fire resistance and durability, and is more environmentally friendly. In this paper, a high-strength metakaolin-based geopolymer composite (HMGC) has been developed by utilizing qu...

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Autores principales: Li, Qiang, Chen, Shikun, Zhang, Yajun, Hu, Yunjin, Wang, Quanlin, Zhou, Quan, Yan, Yongmao, Liu, Yi, Yan, Dongming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182071/
https://www.ncbi.nlm.nih.gov/pubmed/35683255
http://dx.doi.org/10.3390/ma15113958
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author Li, Qiang
Chen, Shikun
Zhang, Yajun
Hu, Yunjin
Wang, Quanlin
Zhou, Quan
Yan, Yongmao
Liu, Yi
Yan, Dongming
author_facet Li, Qiang
Chen, Shikun
Zhang, Yajun
Hu, Yunjin
Wang, Quanlin
Zhou, Quan
Yan, Yongmao
Liu, Yi
Yan, Dongming
author_sort Li, Qiang
collection PubMed
description Geopolymer is a new type of synthesized aluminosilicate material. Compared with ordinary Portland cement, it has better fire resistance and durability, and is more environmentally friendly. In this paper, a high-strength metakaolin-based geopolymer composite (HMGC) has been developed by utilizing quartz powder and steel fibers. The optimization compositions and effect of curing temperatures (from ambient temperature to 90 °C) on the strength performance of the HMGC is studied. The optimized 1-day compressive strength of the HMGC can reach 80 MPa, and the 3-day compressive strength is close to 100 MPa (97.49 MPa). Combined with XRD, FTIR, SEM and MIP characterization, the mechanisms behind the strength development under different curing temperatures are analyzed. The results show that heat curing can significantly speed up the process of geopolymerization and increase the early strength of the HMGC. However, long-term heat curing under high temperature (such as 90 °C, 7 days) would reduce the mechanical strength of the HMGC. Prolonged high-temperature curing increases the pores and micro-defects in the gel phase of the HMGC, which may be attributed to chemical shrinkage. Thus, the curing temperature should be carefully controlled to make a HMGC with better performance.
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spelling pubmed-91820712022-06-10 Effect of Curing Temperature on High-Strength Metakaolin-Based Geopolymer Composite (HMGC) with Quartz Powder and Steel Fibers Li, Qiang Chen, Shikun Zhang, Yajun Hu, Yunjin Wang, Quanlin Zhou, Quan Yan, Yongmao Liu, Yi Yan, Dongming Materials (Basel) Article Geopolymer is a new type of synthesized aluminosilicate material. Compared with ordinary Portland cement, it has better fire resistance and durability, and is more environmentally friendly. In this paper, a high-strength metakaolin-based geopolymer composite (HMGC) has been developed by utilizing quartz powder and steel fibers. The optimization compositions and effect of curing temperatures (from ambient temperature to 90 °C) on the strength performance of the HMGC is studied. The optimized 1-day compressive strength of the HMGC can reach 80 MPa, and the 3-day compressive strength is close to 100 MPa (97.49 MPa). Combined with XRD, FTIR, SEM and MIP characterization, the mechanisms behind the strength development under different curing temperatures are analyzed. The results show that heat curing can significantly speed up the process of geopolymerization and increase the early strength of the HMGC. However, long-term heat curing under high temperature (such as 90 °C, 7 days) would reduce the mechanical strength of the HMGC. Prolonged high-temperature curing increases the pores and micro-defects in the gel phase of the HMGC, which may be attributed to chemical shrinkage. Thus, the curing temperature should be carefully controlled to make a HMGC with better performance. MDPI 2022-06-02 /pmc/articles/PMC9182071/ /pubmed/35683255 http://dx.doi.org/10.3390/ma15113958 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
Li, Qiang
Chen, Shikun
Zhang, Yajun
Hu, Yunjin
Wang, Quanlin
Zhou, Quan
Yan, Yongmao
Liu, Yi
Yan, Dongming
Effect of Curing Temperature on High-Strength Metakaolin-Based Geopolymer Composite (HMGC) with Quartz Powder and Steel Fibers
title Effect of Curing Temperature on High-Strength Metakaolin-Based Geopolymer Composite (HMGC) with Quartz Powder and Steel Fibers
title_full Effect of Curing Temperature on High-Strength Metakaolin-Based Geopolymer Composite (HMGC) with Quartz Powder and Steel Fibers
title_fullStr Effect of Curing Temperature on High-Strength Metakaolin-Based Geopolymer Composite (HMGC) with Quartz Powder and Steel Fibers
title_full_unstemmed Effect of Curing Temperature on High-Strength Metakaolin-Based Geopolymer Composite (HMGC) with Quartz Powder and Steel Fibers
title_short Effect of Curing Temperature on High-Strength Metakaolin-Based Geopolymer Composite (HMGC) with Quartz Powder and Steel Fibers
title_sort effect of curing temperature on high-strength metakaolin-based geopolymer composite (hmgc) with quartz powder and steel fibers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182071/
https://www.ncbi.nlm.nih.gov/pubmed/35683255
http://dx.doi.org/10.3390/ma15113958
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