Analysis of strength property and pore characteristics of Taihang limestone using X-ray computed tomography at high temperatures

Abstract Rising temperature will cause the changes of pore characteristics and strength property in rock. This research takes the limestone produced in Taihang Mountains as the research object, and performs high-temperature treatment within 25–1000 °C. The high-resolution X-ray computed tomography (...

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Autores principales:	Shi Liu, Zhe Huang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3bc93d6afeec4eb384cd03c7d6f991f4
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spelling	oai:doaj.org-article:3bc93d6afeec4eb384cd03c7d6f991f42021-12-02T16:10:38ZAnalysis of strength property and pore characteristics of Taihang limestone using X-ray computed tomography at high temperatures10.1038/s41598-021-92928-z2045-2322https://doaj.org/article/3bc93d6afeec4eb384cd03c7d6f991f42021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92928-zhttps://doaj.org/toc/2045-2322Abstract Rising temperature will cause the changes of pore characteristics and strength property in rock. This research takes the limestone produced in Taihang Mountains as the research object, and performs high-temperature treatment within 25–1000 °C. The high-resolution X-ray computed tomography (CT) scanning test method is used to visually reconstruct the three-dimensional image of the sample, and obtain the spatial distribution status of the mesoscopic parameters of the bones, pores/cracks, etc. The results show that when the temperature exceeded 700 °C, the samples appeared milky white in appearance and as the temperature increased, the color gradually turned white, macroscopic cracks began to appear on the surface, while the meso-pores connected rapidly, reflecting a typical progressive destruction process from inside to outside. The change law of volume porosity with temperature has a consistent trend with that of the apparent morphology of the sample. Similarly, the mechanical test results suggest that 700 °C is also the turning temperature for strength deterioration and brittle-plastic transformation of sample. Based on the results of high-temperature test, CT test and mechanical test, there are enough evidences to show that, for the limestone sample, 700 °C is probably to be the mutation temperature of physical–mechanical behavior.Shi LiuZhe HuangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shi Liu Zhe Huang Analysis of strength property and pore characteristics of Taihang limestone using X-ray computed tomography at high temperatures
description	Abstract Rising temperature will cause the changes of pore characteristics and strength property in rock. This research takes the limestone produced in Taihang Mountains as the research object, and performs high-temperature treatment within 25–1000 °C. The high-resolution X-ray computed tomography (CT) scanning test method is used to visually reconstruct the three-dimensional image of the sample, and obtain the spatial distribution status of the mesoscopic parameters of the bones, pores/cracks, etc. The results show that when the temperature exceeded 700 °C, the samples appeared milky white in appearance and as the temperature increased, the color gradually turned white, macroscopic cracks began to appear on the surface, while the meso-pores connected rapidly, reflecting a typical progressive destruction process from inside to outside. The change law of volume porosity with temperature has a consistent trend with that of the apparent morphology of the sample. Similarly, the mechanical test results suggest that 700 °C is also the turning temperature for strength deterioration and brittle-plastic transformation of sample. Based on the results of high-temperature test, CT test and mechanical test, there are enough evidences to show that, for the limestone sample, 700 °C is probably to be the mutation temperature of physical–mechanical behavior.
format	article
author	Shi Liu Zhe Huang
author_facet	Shi Liu Zhe Huang
author_sort	Shi Liu
title	Analysis of strength property and pore characteristics of Taihang limestone using X-ray computed tomography at high temperatures
title_short	Analysis of strength property and pore characteristics of Taihang limestone using X-ray computed tomography at high temperatures
title_full	Analysis of strength property and pore characteristics of Taihang limestone using X-ray computed tomography at high temperatures
title_fullStr	Analysis of strength property and pore characteristics of Taihang limestone using X-ray computed tomography at high temperatures
title_full_unstemmed	Analysis of strength property and pore characteristics of Taihang limestone using X-ray computed tomography at high temperatures
title_sort	analysis of strength property and pore characteristics of taihang limestone using x-ray computed tomography at high temperatures
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3bc93d6afeec4eb384cd03c7d6f991f4
work_keys_str_mv	AT shiliu analysisofstrengthpropertyandporecharacteristicsoftaihanglimestoneusingxraycomputedtomographyathightemperatures AT zhehuang analysisofstrengthpropertyandporecharacteristicsoftaihanglimestoneusingxraycomputedtomographyathightemperatures
_version_	1718384404092420096

Analysis of strength property and pore characteristics of Taihang limestone using X-ray computed tomography at high temperatures

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