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Evaluation of macro- and meso-mechanical properties of concrete under the aggressiveness of landfill leachate
Current researches on the mechanical properties of concrete are mainly concentrated on the aggressiveness of sulfate, chloride ion, acid and freeze–thaw cycles. However, the evolution of concrete mechanical properties aggressived by landfill leachate remains to be revealed. As the micro-nano indenta...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8913598/ https://www.ncbi.nlm.nih.gov/pubmed/35273201 http://dx.doi.org/10.1038/s41598-022-07418-7 |
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author | Feng, Wei |
author_facet | Feng, Wei |
author_sort | Feng, Wei |
collection | PubMed |
description | Current researches on the mechanical properties of concrete are mainly concentrated on the aggressiveness of sulfate, chloride ion, acid and freeze–thaw cycles. However, the evolution of concrete mechanical properties aggressived by landfill leachate remains to be revealed. As the micro-nano indentation test is a new method to measure the fine/micro mechanical behavior of materials, it is used in this research to evaluate the micro-mechanics of the landfill leachate of the concrete sample surface and different aggressived depths. In addition, the evolution of the macro-mechanical properties of concrete aggressived by the landfill leachate was studied through uniaxial compression tests. The results show that the hydration products with high elastic modulus are consumed by the aggressiveness of landfill leachate, which results in a large number of microscopic cracks on the surface of the concrete. Moreover, the longer the aggressive time, the shallower the aggressive depth, and the more severe the deterioration of the micromechanical properties of the sample surface. It is also notable that the uniaxial compressive strength of the concrete samples aggressived by landfill leachate showed a linear increase and then gradually decrease. Comparing with the sodium chloride and sodium sulfate solutions, the landfill leachate has the most significant weakening effect on the elastic modulus of concrete. |
format | Online Article Text |
id | pubmed-8913598 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-89135982022-03-11 Evaluation of macro- and meso-mechanical properties of concrete under the aggressiveness of landfill leachate Feng, Wei Sci Rep Article Current researches on the mechanical properties of concrete are mainly concentrated on the aggressiveness of sulfate, chloride ion, acid and freeze–thaw cycles. However, the evolution of concrete mechanical properties aggressived by landfill leachate remains to be revealed. As the micro-nano indentation test is a new method to measure the fine/micro mechanical behavior of materials, it is used in this research to evaluate the micro-mechanics of the landfill leachate of the concrete sample surface and different aggressived depths. In addition, the evolution of the macro-mechanical properties of concrete aggressived by the landfill leachate was studied through uniaxial compression tests. The results show that the hydration products with high elastic modulus are consumed by the aggressiveness of landfill leachate, which results in a large number of microscopic cracks on the surface of the concrete. Moreover, the longer the aggressive time, the shallower the aggressive depth, and the more severe the deterioration of the micromechanical properties of the sample surface. It is also notable that the uniaxial compressive strength of the concrete samples aggressived by landfill leachate showed a linear increase and then gradually decrease. Comparing with the sodium chloride and sodium sulfate solutions, the landfill leachate has the most significant weakening effect on the elastic modulus of concrete. Nature Publishing Group UK 2022-03-10 /pmc/articles/PMC8913598/ /pubmed/35273201 http://dx.doi.org/10.1038/s41598-022-07418-7 Text en © The Author(s) 2022 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 Feng, Wei Evaluation of macro- and meso-mechanical properties of concrete under the aggressiveness of landfill leachate |
title | Evaluation of macro- and meso-mechanical properties of concrete under the aggressiveness of landfill leachate |
title_full | Evaluation of macro- and meso-mechanical properties of concrete under the aggressiveness of landfill leachate |
title_fullStr | Evaluation of macro- and meso-mechanical properties of concrete under the aggressiveness of landfill leachate |
title_full_unstemmed | Evaluation of macro- and meso-mechanical properties of concrete under the aggressiveness of landfill leachate |
title_short | Evaluation of macro- and meso-mechanical properties of concrete under the aggressiveness of landfill leachate |
title_sort | evaluation of macro- and meso-mechanical properties of concrete under the aggressiveness of landfill leachate |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8913598/ https://www.ncbi.nlm.nih.gov/pubmed/35273201 http://dx.doi.org/10.1038/s41598-022-07418-7 |
work_keys_str_mv | AT fengwei evaluationofmacroandmesomechanicalpropertiesofconcreteundertheaggressivenessoflandfillleachate |