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Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar

Increasing the water–cement ratio and water-reducer dosage of cement slurry enhances its fluidity. However, a high water–cement ratio diminishes the beneficial effects of water reducers on fluidity. The stone content of the slurry decreases as the water-reducer dosage increases. Additionally, the wa...

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Autores principales: Wu, Chaoguang, Chen, Zhiya, Zhang, Xuemin, Li, Zikun, Wang, Lichuan, Ouyang, Bin, Liu, Jin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10608292/
https://www.ncbi.nlm.nih.gov/pubmed/37895799
http://dx.doi.org/10.3390/ma16206819
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author Wu, Chaoguang
Chen, Zhiya
Zhang, Xuemin
Li, Zikun
Wang, Lichuan
Ouyang, Bin
Liu, Jin
author_facet Wu, Chaoguang
Chen, Zhiya
Zhang, Xuemin
Li, Zikun
Wang, Lichuan
Ouyang, Bin
Liu, Jin
author_sort Wu, Chaoguang
collection PubMed
description Increasing the water–cement ratio and water-reducer dosage of cement slurry enhances its fluidity. However, a high water–cement ratio diminishes the beneficial effects of water reducers on fluidity. The stone content of the slurry decreases as the water-reducer dosage increases. Additionally, the water–cement ratio significantly affects stone content. However, when the water–cement ratio exceeds a threshold value, stone content decreases. Furthermore, the threshold value of the water–cement ratio decreases with increasing water-reducer dosage. Without the addition of the water reducer, as the water–cement ratio increases the overall integrity of the grout stone decreases. The addition of the water reducer alters the surface pore distribution, wherein “uniform small pores” change to “localized large pores.” Based on the multi-objective optimization of Matlab, the recommended optimal mix composition for a slow-setting cement slurry is a water–cement ratio of 0.25 and water-reducer dosage of 1.5%. With the use of this optimized mix composition, the stone content and compressive strength increase by 7.8% and 145.6%, respectively, compared to those obtained using the recommended mix ratio in the specifications. Additionally, all relevant performance parameters meet the requirements specified by previous standards.
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spelling pubmed-106082922023-10-28 Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar Wu, Chaoguang Chen, Zhiya Zhang, Xuemin Li, Zikun Wang, Lichuan Ouyang, Bin Liu, Jin Materials (Basel) Article Increasing the water–cement ratio and water-reducer dosage of cement slurry enhances its fluidity. However, a high water–cement ratio diminishes the beneficial effects of water reducers on fluidity. The stone content of the slurry decreases as the water-reducer dosage increases. Additionally, the water–cement ratio significantly affects stone content. However, when the water–cement ratio exceeds a threshold value, stone content decreases. Furthermore, the threshold value of the water–cement ratio decreases with increasing water-reducer dosage. Without the addition of the water reducer, as the water–cement ratio increases the overall integrity of the grout stone decreases. The addition of the water reducer alters the surface pore distribution, wherein “uniform small pores” change to “localized large pores.” Based on the multi-objective optimization of Matlab, the recommended optimal mix composition for a slow-setting cement slurry is a water–cement ratio of 0.25 and water-reducer dosage of 1.5%. With the use of this optimized mix composition, the stone content and compressive strength increase by 7.8% and 145.6%, respectively, compared to those obtained using the recommended mix ratio in the specifications. Additionally, all relevant performance parameters meet the requirements specified by previous standards. MDPI 2023-10-23 /pmc/articles/PMC10608292/ /pubmed/37895799 http://dx.doi.org/10.3390/ma16206819 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
Wu, Chaoguang
Chen, Zhiya
Zhang, Xuemin
Li, Zikun
Wang, Lichuan
Ouyang, Bin
Liu, Jin
Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar
title Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar
title_full Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar
title_fullStr Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar
title_full_unstemmed Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar
title_short Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar
title_sort performance of the cement grouting material and optimization of the mix proportion for the free section of the prestressed anchor bar
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10608292/
https://www.ncbi.nlm.nih.gov/pubmed/37895799
http://dx.doi.org/10.3390/ma16206819
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