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Effects of breccia and water contents on the mechanical properties of fault-core-zone materials

Determining the mechanical properties of fault-core-zone materials is challenging because of the low strength of such materials, which affects field sampling, specimen preparation, and laboratory testing. We overcame this problem by preparing and testing mechanical properties of 132 artificial fault...

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Autores principales: Yun, Hyun-Seok, Moon, Seong-Woo, Seo, Yong-Seok
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9056520/
https://www.ncbi.nlm.nih.gov/pubmed/35490176
http://dx.doi.org/10.1038/s41598-022-10995-2
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author Yun, Hyun-Seok
Moon, Seong-Woo
Seo, Yong-Seok
author_facet Yun, Hyun-Seok
Moon, Seong-Woo
Seo, Yong-Seok
author_sort Yun, Hyun-Seok
collection PubMed
description Determining the mechanical properties of fault-core-zone materials is challenging because of the low strength of such materials, which affects field sampling, specimen preparation, and laboratory testing. We overcame this problem by preparing and testing mechanical properties of 132 artificial fault-core-zone specimens consisting of mixtures of breccia, sand, clay, and water. The unconfined compressive strength (UCS), elastic modulus (E), and penetration resistance value (PRV) of these fault-core-zone materials were measured, and the effects of breccia content and water content on mechanical properties were assessed. Results show that UCS is inversely proportional to breccia content and water content, and that E is inversely proportional to water content. Furthermore, the inverse relationship of UCS with water content varies with breccia content. UCS is proportional to both PRV and E, and the relationship for each varies with breccia content. High coefficients of determination (R(2) = 0.62–0.88) between the parameters suggest that breccia content, water content, and PRV are potentially useful parameters for estimating the mechanical properties of fault core zones.
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spelling pubmed-90565202022-05-02 Effects of breccia and water contents on the mechanical properties of fault-core-zone materials Yun, Hyun-Seok Moon, Seong-Woo Seo, Yong-Seok Sci Rep Article Determining the mechanical properties of fault-core-zone materials is challenging because of the low strength of such materials, which affects field sampling, specimen preparation, and laboratory testing. We overcame this problem by preparing and testing mechanical properties of 132 artificial fault-core-zone specimens consisting of mixtures of breccia, sand, clay, and water. The unconfined compressive strength (UCS), elastic modulus (E), and penetration resistance value (PRV) of these fault-core-zone materials were measured, and the effects of breccia content and water content on mechanical properties were assessed. Results show that UCS is inversely proportional to breccia content and water content, and that E is inversely proportional to water content. Furthermore, the inverse relationship of UCS with water content varies with breccia content. UCS is proportional to both PRV and E, and the relationship for each varies with breccia content. High coefficients of determination (R(2) = 0.62–0.88) between the parameters suggest that breccia content, water content, and PRV are potentially useful parameters for estimating the mechanical properties of fault core zones. Nature Publishing Group UK 2022-04-30 /pmc/articles/PMC9056520/ /pubmed/35490176 http://dx.doi.org/10.1038/s41598-022-10995-2 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
Yun, Hyun-Seok
Moon, Seong-Woo
Seo, Yong-Seok
Effects of breccia and water contents on the mechanical properties of fault-core-zone materials
title Effects of breccia and water contents on the mechanical properties of fault-core-zone materials
title_full Effects of breccia and water contents on the mechanical properties of fault-core-zone materials
title_fullStr Effects of breccia and water contents on the mechanical properties of fault-core-zone materials
title_full_unstemmed Effects of breccia and water contents on the mechanical properties of fault-core-zone materials
title_short Effects of breccia and water contents on the mechanical properties of fault-core-zone materials
title_sort effects of breccia and water contents on the mechanical properties of fault-core-zone materials
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9056520/
https://www.ncbi.nlm.nih.gov/pubmed/35490176
http://dx.doi.org/10.1038/s41598-022-10995-2
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