Temperature Effect on Crack Evolution of Red Clay in Guilin

As temperature changes, red clay is prone to shrink and generate cracks, which weaken the structure and the stability of soil mass, leading to various engineering problems, such as damage and instability in engineering structures. To study the effect of environmental temperature on the crack evoluti...

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Autores principales:	Guiyuan Xiao, Ziming Ye, Guangli Xu, Jian Zeng, Lu Zhang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	red clay crack evolution temperature quantitative analysis surface crack rate Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/522d1dfbad2d4213a14fb9177f25f2e5
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spelling	oai:doaj.org-article:522d1dfbad2d4213a14fb9177f25f2e52021-11-11T19:54:58ZTemperature Effect on Crack Evolution of Red Clay in Guilin10.3390/w132130252073-4441https://doaj.org/article/522d1dfbad2d4213a14fb9177f25f2e52021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/3025https://doaj.org/toc/2073-4441As temperature changes, red clay is prone to shrink and generate cracks, which weaken the structure and the stability of soil mass, leading to various engineering problems, such as damage and instability in engineering structures. To study the effect of environmental temperature on the crack evolution of red clay, Guilin Red Clay was taken as the research object, and the saturated mud samples were dried at 23, 40, and 60 °C respectively. During the drying process of the samples, the change of moisture content and the evolution process of surface cracks were monitored by high-definition automatic photographing and a weighing device, which were also improved. We used PCAS software to process the crack image, extract various geometric elements, observe, and analyze the change rule of the cracks during the drying process of red clay at different temperatures. The test results show that the cracking evolution of red clay at different temperatures is mainly divided into three stages: (i) the initiation of micro cracks; (ii) crack progress; and (iii) crack stability. With the increase of environmental temperature, stage (i) took less time. Meanwhile, the growth rate of the crack area increased. The number of final crack blocks of soil is significantly reduced. Moreover, the final crack rate is obviously increased. When the temperature is either 23 °C or 40 °C, the initial cracks almost happen at the same time in the samples with different diameters. While the temperature is higher than 60 °C, the cracking time will delay with the increase of the diameter. In addition, the decrease in water content leads to a decrease in the curvature radius of soil particles. Under the joint action of the surface tension and the matrix suction, the distance between red clay particles becomes shorter, so the time for red clay to start to generate cracks will be shorter, and the final crack rate will increase with the increase in temperature.Guiyuan XiaoZiming YeGuangli XuJian ZengLu ZhangMDPI AGarticlered claycrack evolutiontemperaturequantitative analysissurface crack rateHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3025, p 3025 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	red clay crack evolution temperature quantitative analysis surface crack rate Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	red clay crack evolution temperature quantitative analysis surface crack rate Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Guiyuan Xiao Ziming Ye Guangli Xu Jian Zeng Lu Zhang Temperature Effect on Crack Evolution of Red Clay in Guilin
description	As temperature changes, red clay is prone to shrink and generate cracks, which weaken the structure and the stability of soil mass, leading to various engineering problems, such as damage and instability in engineering structures. To study the effect of environmental temperature on the crack evolution of red clay, Guilin Red Clay was taken as the research object, and the saturated mud samples were dried at 23, 40, and 60 °C respectively. During the drying process of the samples, the change of moisture content and the evolution process of surface cracks were monitored by high-definition automatic photographing and a weighing device, which were also improved. We used PCAS software to process the crack image, extract various geometric elements, observe, and analyze the change rule of the cracks during the drying process of red clay at different temperatures. The test results show that the cracking evolution of red clay at different temperatures is mainly divided into three stages: (i) the initiation of micro cracks; (ii) crack progress; and (iii) crack stability. With the increase of environmental temperature, stage (i) took less time. Meanwhile, the growth rate of the crack area increased. The number of final crack blocks of soil is significantly reduced. Moreover, the final crack rate is obviously increased. When the temperature is either 23 °C or 40 °C, the initial cracks almost happen at the same time in the samples with different diameters. While the temperature is higher than 60 °C, the cracking time will delay with the increase of the diameter. In addition, the decrease in water content leads to a decrease in the curvature radius of soil particles. Under the joint action of the surface tension and the matrix suction, the distance between red clay particles becomes shorter, so the time for red clay to start to generate cracks will be shorter, and the final crack rate will increase with the increase in temperature.
format	article
author	Guiyuan Xiao Ziming Ye Guangli Xu Jian Zeng Lu Zhang
author_facet	Guiyuan Xiao Ziming Ye Guangli Xu Jian Zeng Lu Zhang
author_sort	Guiyuan Xiao
title	Temperature Effect on Crack Evolution of Red Clay in Guilin
title_short	Temperature Effect on Crack Evolution of Red Clay in Guilin
title_full	Temperature Effect on Crack Evolution of Red Clay in Guilin
title_fullStr	Temperature Effect on Crack Evolution of Red Clay in Guilin
title_full_unstemmed	Temperature Effect on Crack Evolution of Red Clay in Guilin
title_sort	temperature effect on crack evolution of red clay in guilin
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/522d1dfbad2d4213a14fb9177f25f2e5
work_keys_str_mv	AT guiyuanxiao temperatureeffectoncrackevolutionofredclayinguilin AT zimingye temperatureeffectoncrackevolutionofredclayinguilin AT guanglixu temperatureeffectoncrackevolutionofredclayinguilin AT jianzeng temperatureeffectoncrackevolutionofredclayinguilin AT luzhang temperatureeffectoncrackevolutionofredclayinguilin
_version_	1718431346535170048

Temperature Effect on Crack Evolution of Red Clay in Guilin

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