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Mechanical Properties and Damage Layer Thickness of Green Concrete under a Low-Temperature Environment
To study the influence of mineral admixtures on concrete’s mechanical properties after a low-temperature exposure, green concrete was prepared by mixing fly ash and slag at different replacement rates. By analysing the changes to concrete’s mechanical properties and the damage layer thickness under...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9657105/ https://www.ncbi.nlm.nih.gov/pubmed/36363001 http://dx.doi.org/10.3390/ma15217409 |
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author | Zhang, Dongsheng Zhang, Tianhao Yang, Qiuning |
author_facet | Zhang, Dongsheng Zhang, Tianhao Yang, Qiuning |
author_sort | Zhang, Dongsheng |
collection | PubMed |
description | To study the influence of mineral admixtures on concrete’s mechanical properties after a low-temperature exposure, green concrete was prepared by mixing fly ash and slag at different replacement rates. By analysing the changes to concrete’s mechanical properties and the damage layer thickness under different ambient temperatures (20, −10, −20, −30, and −40 °C), the change rule of concrete at low temperatures was explored. The results revealed that the compressive strength of concrete, containing either fly ash or slag, peaked at 30 °C; moreover, the slag concrete’s flexural and splitting tensile strength peaked at −40 °C. The best mechanical properties were observed for a fly ash-to-slag ratio of 1:2 (F10S20; i.e., 10% fly ash and 20% slag) and its compressive strength at different temperatures was higher than that of concrete, containing 30% fly ash (F30) or 30% slag (S30), but the flexural and splitting tensile strength was lower than S30. Further, as the temperature decreased, the fly ash concrete’s damaged layer thickness gradually increased. When the content of fly ash and slag were both 15% (F15S15), the damaged layer thickness was minimal at different low temperatures, especially at −30 °C, where the thickness was only 8.31 mm. |
format | Online Article Text |
id | pubmed-9657105 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96571052022-11-15 Mechanical Properties and Damage Layer Thickness of Green Concrete under a Low-Temperature Environment Zhang, Dongsheng Zhang, Tianhao Yang, Qiuning Materials (Basel) Article To study the influence of mineral admixtures on concrete’s mechanical properties after a low-temperature exposure, green concrete was prepared by mixing fly ash and slag at different replacement rates. By analysing the changes to concrete’s mechanical properties and the damage layer thickness under different ambient temperatures (20, −10, −20, −30, and −40 °C), the change rule of concrete at low temperatures was explored. The results revealed that the compressive strength of concrete, containing either fly ash or slag, peaked at 30 °C; moreover, the slag concrete’s flexural and splitting tensile strength peaked at −40 °C. The best mechanical properties were observed for a fly ash-to-slag ratio of 1:2 (F10S20; i.e., 10% fly ash and 20% slag) and its compressive strength at different temperatures was higher than that of concrete, containing 30% fly ash (F30) or 30% slag (S30), but the flexural and splitting tensile strength was lower than S30. Further, as the temperature decreased, the fly ash concrete’s damaged layer thickness gradually increased. When the content of fly ash and slag were both 15% (F15S15), the damaged layer thickness was minimal at different low temperatures, especially at −30 °C, where the thickness was only 8.31 mm. MDPI 2022-10-22 /pmc/articles/PMC9657105/ /pubmed/36363001 http://dx.doi.org/10.3390/ma15217409 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 Zhang, Dongsheng Zhang, Tianhao Yang, Qiuning Mechanical Properties and Damage Layer Thickness of Green Concrete under a Low-Temperature Environment |
title | Mechanical Properties and Damage Layer Thickness of Green Concrete under a Low-Temperature Environment |
title_full | Mechanical Properties and Damage Layer Thickness of Green Concrete under a Low-Temperature Environment |
title_fullStr | Mechanical Properties and Damage Layer Thickness of Green Concrete under a Low-Temperature Environment |
title_full_unstemmed | Mechanical Properties and Damage Layer Thickness of Green Concrete under a Low-Temperature Environment |
title_short | Mechanical Properties and Damage Layer Thickness of Green Concrete under a Low-Temperature Environment |
title_sort | mechanical properties and damage layer thickness of green concrete under a low-temperature environment |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9657105/ https://www.ncbi.nlm.nih.gov/pubmed/36363001 http://dx.doi.org/10.3390/ma15217409 |
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