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Flexural behaviour and evaluation of ultra-high-performance fibre reinforced concrete beams cured at room temperature

Heat treatment is often required for ultra-high-performance concrete (UHPC) to achieve high strength. To broad its use in construction, the effect of different curing conditions on the properties of UHPC has been developed for many years. The experimental investigation of large scale ultra-high-perf...

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Autores principales: Huang, Jinlin, He, Zhiying, Khan, Muhammad Basit Ehsan, Zheng, Xiaohong, Luo, Zhibin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8463697/
https://www.ncbi.nlm.nih.gov/pubmed/34561519
http://dx.doi.org/10.1038/s41598-021-98502-x
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author Huang, Jinlin
He, Zhiying
Khan, Muhammad Basit Ehsan
Zheng, Xiaohong
Luo, Zhibin
author_facet Huang, Jinlin
He, Zhiying
Khan, Muhammad Basit Ehsan
Zheng, Xiaohong
Luo, Zhibin
author_sort Huang, Jinlin
collection PubMed
description Heat treatment is often required for ultra-high-performance concrete (UHPC) to achieve high strength. To broad its use in construction, the effect of different curing conditions on the properties of UHPC has been developed for many years. The experimental investigation of large scale ultra-high-performance fibre reinforced concrete (UHPFRC) beams is limited. In the present study, UHPFRC specimens and concrete cured at 20 °C were prepared to investigate the properties and flexural behaviour. The standard cubic compressive strength of UHPFRC specimens cannot be achieved at curing temperature of 20 °C. The bearing capacity under flexure was enhanced with the increase of reinforcement ratio. The failure modes of beams changed from ductile to brittle as the reinforcement ratio increased from 1.26 to 9.50%. The flexural behaviour of UHPFRC beams cured at room temperature was in accordance with the UHPFRC beams cured at high temperature in previous studies. In addition, the calculation model of CECS38-2004 underestimated the bending moment capacity of the under-reinforced UHPFRC beams (with reinforcement ratio from 0 to 7.85%) and overestimated the bending moment capacity of the UHPFRC beams with high reinforcement ration of 9.50%.
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spelling pubmed-84636972021-09-29 Flexural behaviour and evaluation of ultra-high-performance fibre reinforced concrete beams cured at room temperature Huang, Jinlin He, Zhiying Khan, Muhammad Basit Ehsan Zheng, Xiaohong Luo, Zhibin Sci Rep Article Heat treatment is often required for ultra-high-performance concrete (UHPC) to achieve high strength. To broad its use in construction, the effect of different curing conditions on the properties of UHPC has been developed for many years. The experimental investigation of large scale ultra-high-performance fibre reinforced concrete (UHPFRC) beams is limited. In the present study, UHPFRC specimens and concrete cured at 20 °C were prepared to investigate the properties and flexural behaviour. The standard cubic compressive strength of UHPFRC specimens cannot be achieved at curing temperature of 20 °C. The bearing capacity under flexure was enhanced with the increase of reinforcement ratio. The failure modes of beams changed from ductile to brittle as the reinforcement ratio increased from 1.26 to 9.50%. The flexural behaviour of UHPFRC beams cured at room temperature was in accordance with the UHPFRC beams cured at high temperature in previous studies. In addition, the calculation model of CECS38-2004 underestimated the bending moment capacity of the under-reinforced UHPFRC beams (with reinforcement ratio from 0 to 7.85%) and overestimated the bending moment capacity of the UHPFRC beams with high reinforcement ration of 9.50%. Nature Publishing Group UK 2021-09-24 /pmc/articles/PMC8463697/ /pubmed/34561519 http://dx.doi.org/10.1038/s41598-021-98502-x Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Huang, Jinlin
He, Zhiying
Khan, Muhammad Basit Ehsan
Zheng, Xiaohong
Luo, Zhibin
Flexural behaviour and evaluation of ultra-high-performance fibre reinforced concrete beams cured at room temperature
title Flexural behaviour and evaluation of ultra-high-performance fibre reinforced concrete beams cured at room temperature
title_full Flexural behaviour and evaluation of ultra-high-performance fibre reinforced concrete beams cured at room temperature
title_fullStr Flexural behaviour and evaluation of ultra-high-performance fibre reinforced concrete beams cured at room temperature
title_full_unstemmed Flexural behaviour and evaluation of ultra-high-performance fibre reinforced concrete beams cured at room temperature
title_short Flexural behaviour and evaluation of ultra-high-performance fibre reinforced concrete beams cured at room temperature
title_sort flexural behaviour and evaluation of ultra-high-performance fibre reinforced concrete beams cured at room temperature
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8463697/
https://www.ncbi.nlm.nih.gov/pubmed/34561519
http://dx.doi.org/10.1038/s41598-021-98502-x
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