Mechanical Behavior of Weathered Granite Exposed to Water

Weathered granite has been widely used as an emerging foundation filler for constructing transportation infrastructure. However, various softened rocks weathered due to exposure to water have special properties. Thus, it is necessary to gain a thorough understanding of the various physical and mecha...

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Autores principales:	Miaomiao Sun, Jiangang Yu, Xi Wu, Yuqin Ding, Tengfei Fu, Yingwu Yang, Jiqing Jiang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	weathered granite mechanical behavior strain softening deviator stress consolidation empirical model 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/b6407d72ecb840b7b63a72082a651d39
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spelling	oai:doaj.org-article:b6407d72ecb840b7b63a72082a651d392021-11-11T15:23:43ZMechanical Behavior of Weathered Granite Exposed to Water10.3390/app1121103562076-3417https://doaj.org/article/b6407d72ecb840b7b63a72082a651d392021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10356https://doaj.org/toc/2076-3417Weathered granite has been widely used as an emerging foundation filler for constructing transportation infrastructure. However, various softened rocks weathered due to exposure to water have special properties. Thus, it is necessary to gain a thorough understanding of the various physical and mechanical properties of weathered granite after exposure to water in order to avoid engineering accidents. To this end, this paper conducted a series of undrained triaxial shear tests to compare the mechanical behavior of weathered granite in natural and saturated states. The results demonstrate that the strength of the weathered granite significantly declines when it is exposed to water, and it exhibits noticeable water softening characteristics. Consolidation methods also affect the mechanical properties of weathered granite. The degree of softening of weathered granite decreases with an increase in the deviator stress imposed by the deviator stress consolidation. Subsequently, we established an empirical model for the strain softening of weathered granite suitable for natural and saturated conditions. This model took the elastic modulus of weathered granite before the peak strength as a measure and introduced the strength parameters of the internal friction angle (φ) and the internal cohesion (c). First, the fitted function correlating c and φ with the plastic internal variable was determined, and then the relationship between the strength and the strain-softening parameters was established so as to obtain the complete stress–strain curve of the granite rock. Finally, validation studies were performed to address the capability of the model to predict permanent deformation. It provides a theoretical basis for predicting and calculating the strain softening of weathered granite exposed to water.Miaomiao SunJiangang YuXi WuYuqin DingTengfei FuYingwu YangJiqing JiangMDPI AGarticleweathered granitemechanical behaviorstrain softeningdeviator stress consolidationempirical modelTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10356, p 10356 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	weathered granite mechanical behavior strain softening deviator stress consolidation empirical model Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	weathered granite mechanical behavior strain softening deviator stress consolidation empirical model Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Miaomiao Sun Jiangang Yu Xi Wu Yuqin Ding Tengfei Fu Yingwu Yang Jiqing Jiang Mechanical Behavior of Weathered Granite Exposed to Water
description	Weathered granite has been widely used as an emerging foundation filler for constructing transportation infrastructure. However, various softened rocks weathered due to exposure to water have special properties. Thus, it is necessary to gain a thorough understanding of the various physical and mechanical properties of weathered granite after exposure to water in order to avoid engineering accidents. To this end, this paper conducted a series of undrained triaxial shear tests to compare the mechanical behavior of weathered granite in natural and saturated states. The results demonstrate that the strength of the weathered granite significantly declines when it is exposed to water, and it exhibits noticeable water softening characteristics. Consolidation methods also affect the mechanical properties of weathered granite. The degree of softening of weathered granite decreases with an increase in the deviator stress imposed by the deviator stress consolidation. Subsequently, we established an empirical model for the strain softening of weathered granite suitable for natural and saturated conditions. This model took the elastic modulus of weathered granite before the peak strength as a measure and introduced the strength parameters of the internal friction angle (φ) and the internal cohesion (c). First, the fitted function correlating c and φ with the plastic internal variable was determined, and then the relationship between the strength and the strain-softening parameters was established so as to obtain the complete stress–strain curve of the granite rock. Finally, validation studies were performed to address the capability of the model to predict permanent deformation. It provides a theoretical basis for predicting and calculating the strain softening of weathered granite exposed to water.
format	article
author	Miaomiao Sun Jiangang Yu Xi Wu Yuqin Ding Tengfei Fu Yingwu Yang Jiqing Jiang
author_facet	Miaomiao Sun Jiangang Yu Xi Wu Yuqin Ding Tengfei Fu Yingwu Yang Jiqing Jiang
author_sort	Miaomiao Sun
title	Mechanical Behavior of Weathered Granite Exposed to Water
title_short	Mechanical Behavior of Weathered Granite Exposed to Water
title_full	Mechanical Behavior of Weathered Granite Exposed to Water
title_fullStr	Mechanical Behavior of Weathered Granite Exposed to Water
title_full_unstemmed	Mechanical Behavior of Weathered Granite Exposed to Water
title_sort	mechanical behavior of weathered granite exposed to water
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b6407d72ecb840b7b63a72082a651d39
work_keys_str_mv	AT miaomiaosun mechanicalbehaviorofweatheredgraniteexposedtowater AT jiangangyu mechanicalbehaviorofweatheredgraniteexposedtowater AT xiwu mechanicalbehaviorofweatheredgraniteexposedtowater AT yuqinding mechanicalbehaviorofweatheredgraniteexposedtowater AT tengfeifu mechanicalbehaviorofweatheredgraniteexposedtowater AT yingwuyang mechanicalbehaviorofweatheredgraniteexposedtowater AT jiqingjiang mechanicalbehaviorofweatheredgraniteexposedtowater
_version_	1718435387792162816

Mechanical Behavior of Weathered Granite Exposed to Water

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