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Variation Pattern of the Elastic Modulus of Concrete under Combined Humidity and Heat Conditions
The coupling effect of moisture content and temperature on the elastic modulus of concrete is experimentally investigated. The elastic modulus of dry concrete exhibits a clear temperature-weakening effect, while the elastic modulus of wet concrete exhibits a water-strengthening effect at room temper...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10419823/ https://www.ncbi.nlm.nih.gov/pubmed/37570153 http://dx.doi.org/10.3390/ma16155447 |
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author | Li, Ping Zhang, Yanru Duan, Shiwei Huang, Ruiyuan Gu, Jiming |
author_facet | Li, Ping Zhang, Yanru Duan, Shiwei Huang, Ruiyuan Gu, Jiming |
author_sort | Li, Ping |
collection | PubMed |
description | The coupling effect of moisture content and temperature on the elastic modulus of concrete is experimentally investigated. The elastic modulus of dry concrete exhibits a clear temperature-weakening effect, while the elastic modulus of wet concrete exhibits a water-strengthening effect at room temperature. Under humidity-heat conditions, the elastic modulus of wet concrete declines with the temperature rise. When the temperature is 20 °C, 200 °C, 400 °C, 520 °C, and 620 °C, the humidity–heat coupling factors of the elastic modulus change rate [Formula: see text] with moisture content are 0.08, 0.07, 0.04, 0.01, and −0.03, respectively, and the declining rate increases with the rise of moisture content. The relation between the humidity-heat coupling factor DIF, moisture content, and temperature was established; The equivalent relation between the water-strengthening effect and the temperature-weakening effect of the elastic modulus was obtained. The temperature range of the strengthening effect and “apparent weakening effect” of water stored inside concrete before heating on elastic modulus was determined; The evolutionary mechanism of the competition between the microcrack expansion and healing of concrete under combined humidity and heat conditions was revealed. |
format | Online Article Text |
id | pubmed-10419823 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-104198232023-08-12 Variation Pattern of the Elastic Modulus of Concrete under Combined Humidity and Heat Conditions Li, Ping Zhang, Yanru Duan, Shiwei Huang, Ruiyuan Gu, Jiming Materials (Basel) Article The coupling effect of moisture content and temperature on the elastic modulus of concrete is experimentally investigated. The elastic modulus of dry concrete exhibits a clear temperature-weakening effect, while the elastic modulus of wet concrete exhibits a water-strengthening effect at room temperature. Under humidity-heat conditions, the elastic modulus of wet concrete declines with the temperature rise. When the temperature is 20 °C, 200 °C, 400 °C, 520 °C, and 620 °C, the humidity–heat coupling factors of the elastic modulus change rate [Formula: see text] with moisture content are 0.08, 0.07, 0.04, 0.01, and −0.03, respectively, and the declining rate increases with the rise of moisture content. The relation between the humidity-heat coupling factor DIF, moisture content, and temperature was established; The equivalent relation between the water-strengthening effect and the temperature-weakening effect of the elastic modulus was obtained. The temperature range of the strengthening effect and “apparent weakening effect” of water stored inside concrete before heating on elastic modulus was determined; The evolutionary mechanism of the competition between the microcrack expansion and healing of concrete under combined humidity and heat conditions was revealed. MDPI 2023-08-03 /pmc/articles/PMC10419823/ /pubmed/37570153 http://dx.doi.org/10.3390/ma16155447 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 Li, Ping Zhang, Yanru Duan, Shiwei Huang, Ruiyuan Gu, Jiming Variation Pattern of the Elastic Modulus of Concrete under Combined Humidity and Heat Conditions |
title | Variation Pattern of the Elastic Modulus of Concrete under Combined Humidity and Heat Conditions |
title_full | Variation Pattern of the Elastic Modulus of Concrete under Combined Humidity and Heat Conditions |
title_fullStr | Variation Pattern of the Elastic Modulus of Concrete under Combined Humidity and Heat Conditions |
title_full_unstemmed | Variation Pattern of the Elastic Modulus of Concrete under Combined Humidity and Heat Conditions |
title_short | Variation Pattern of the Elastic Modulus of Concrete under Combined Humidity and Heat Conditions |
title_sort | variation pattern of the elastic modulus of concrete under combined humidity and heat conditions |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10419823/ https://www.ncbi.nlm.nih.gov/pubmed/37570153 http://dx.doi.org/10.3390/ma16155447 |
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