Degradation of Mechanical Behavior of Sandstone under Freeze-Thaw Conditions with Different Low Temperatures

This study investigated the effects of freezing temperature under freeze-thaw cycling conditions on the mechanical behavior of sandstone. First, the sandstone specimens were subjected to 10-time freeze-thaw cycling treatments at different freezing temperatures (−20, −40, −50, and −60 °C). Subsequent...

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Autores principales:	Jingwei Gao, Chao Xu, Yan Xi, Lifeng Fan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	freezing temperature freeze-thaw cycles mechanical behavior sandstone Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/df9d83efc82e4c039230dcbfa067d688
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spelling	oai:doaj.org-article:df9d83efc82e4c039230dcbfa067d6882021-11-25T16:34:23ZDegradation of Mechanical Behavior of Sandstone under Freeze-Thaw Conditions with Different Low Temperatures10.3390/app1122106532076-3417https://doaj.org/article/df9d83efc82e4c039230dcbfa067d6882021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10653https://doaj.org/toc/2076-3417This study investigated the effects of freezing temperature under freeze-thaw cycling conditions on the mechanical behavior of sandstone. First, the sandstone specimens were subjected to 10-time freeze-thaw cycling treatments at different freezing temperatures (−20, −40, −50, and −60 °C). Subsequently, a series of density, ultrasonic wave, and static and dynamic mechanical behavior tests were carried out. Finally, the effects of freezing temperature on the density, P-wave velocity, stress–strain curves, static and dynamic uniaxial compressive strength, static elastic modulus, and dynamic energy absorption of sandstone were discussed. The results show that the density slightly decreases as temperature decreases, approximately by 1.0% at −60 °C compared with that at 20 °C. The P-wave velocity, static and dynamic uniaxial compressive strength, static elastic modulus, and dynamic energy absorption obviously decrease. As freezing temperature decreases from 20 to −60 °C, the static uniaxial compressive strength, static elastic modulus, dynamic strength, and dynamic energy absorption of sandstone decrease by 16.8%, 21.2%, 30.8%, and 30.7%, respectively. The dynamic mechanical behavior is more sensitive to the freezing temperature during freeze-thawing cycling compared with the static mechanical behavior. In addition, a higher strain rate can induce a higher dynamic strength and energy absorption.Jingwei GaoChao XuYan XiLifeng FanMDPI AGarticlefreezing temperaturefreeze-thaw cyclesmechanical behaviorsandstoneTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10653, p 10653 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	freezing temperature freeze-thaw cycles mechanical behavior sandstone Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	freezing temperature freeze-thaw cycles mechanical behavior sandstone Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Jingwei Gao Chao Xu Yan Xi Lifeng Fan Degradation of Mechanical Behavior of Sandstone under Freeze-Thaw Conditions with Different Low Temperatures
description	This study investigated the effects of freezing temperature under freeze-thaw cycling conditions on the mechanical behavior of sandstone. First, the sandstone specimens were subjected to 10-time freeze-thaw cycling treatments at different freezing temperatures (−20, −40, −50, and −60 °C). Subsequently, a series of density, ultrasonic wave, and static and dynamic mechanical behavior tests were carried out. Finally, the effects of freezing temperature on the density, P-wave velocity, stress–strain curves, static and dynamic uniaxial compressive strength, static elastic modulus, and dynamic energy absorption of sandstone were discussed. The results show that the density slightly decreases as temperature decreases, approximately by 1.0% at −60 °C compared with that at 20 °C. The P-wave velocity, static and dynamic uniaxial compressive strength, static elastic modulus, and dynamic energy absorption obviously decrease. As freezing temperature decreases from 20 to −60 °C, the static uniaxial compressive strength, static elastic modulus, dynamic strength, and dynamic energy absorption of sandstone decrease by 16.8%, 21.2%, 30.8%, and 30.7%, respectively. The dynamic mechanical behavior is more sensitive to the freezing temperature during freeze-thawing cycling compared with the static mechanical behavior. In addition, a higher strain rate can induce a higher dynamic strength and energy absorption.
format	article
author	Jingwei Gao Chao Xu Yan Xi Lifeng Fan
author_facet	Jingwei Gao Chao Xu Yan Xi Lifeng Fan
author_sort	Jingwei Gao
title	Degradation of Mechanical Behavior of Sandstone under Freeze-Thaw Conditions with Different Low Temperatures
title_short	Degradation of Mechanical Behavior of Sandstone under Freeze-Thaw Conditions with Different Low Temperatures
title_full	Degradation of Mechanical Behavior of Sandstone under Freeze-Thaw Conditions with Different Low Temperatures
title_fullStr	Degradation of Mechanical Behavior of Sandstone under Freeze-Thaw Conditions with Different Low Temperatures
title_full_unstemmed	Degradation of Mechanical Behavior of Sandstone under Freeze-Thaw Conditions with Different Low Temperatures
title_sort	degradation of mechanical behavior of sandstone under freeze-thaw conditions with different low temperatures
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/df9d83efc82e4c039230dcbfa067d688
work_keys_str_mv	AT jingweigao degradationofmechanicalbehaviorofsandstoneunderfreezethawconditionswithdifferentlowtemperatures AT chaoxu degradationofmechanicalbehaviorofsandstoneunderfreezethawconditionswithdifferentlowtemperatures AT yanxi degradationofmechanicalbehaviorofsandstoneunderfreezethawconditionswithdifferentlowtemperatures AT lifengfan degradationofmechanicalbehaviorofsandstoneunderfreezethawconditionswithdifferentlowtemperatures
_version_	1718413108077133824

Degradation of Mechanical Behavior of Sandstone under Freeze-Thaw Conditions with Different Low Temperatures

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