Determining a representative elementary area for soil desiccation cracking

IF 6.9 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL
C. Clay Goodman, Farshid Vahedifard
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引用次数: 0

Abstract

Laboratory tests involving soil desiccation cracking are subjected to geometrical boundary constraints that are not always present in field conditions. To better understand the effects of sample geometry on desiccation cracks, several researchers have used controlled climatic conditions coupled with image analysis to accurately quantify the crack characteristics of soil samples subjected to laboratory studies. However, to date, no known studies in the literature present a simple method for determining the appropriate sample size for laboratory desiccation cracking testing that ensures the effects of boundary conditions are minimized. The primary objective of this research is to address this gap by proposing an experimental approach to determine a representative elementary area (REA) for soil desiccation cracking studies in the laboratory. To achieve this, we conducted four series of tests using an environmental chamber. One preliminary test series was carried out to identify the optimal sample preparation and REA testing techniques. Subsequently, three additional series of REA tests were conducted with sample thicknesses of 2.5, 5.0, and 7.5 mm to explore the impact of sample size on the REA. The REA for each sample thickness was determined by examining the surface area at which the surface crack ratio (RSC) for the sample was unaffected by boundary constraints. The results indicate that as sample thickness increases, REA increases. Further research is needed to determine how the REA is affected by sample shape and soil type.
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来源期刊
Engineering Geology
Engineering Geology 地学-地球科学综合
CiteScore
13.70
自引率
12.20%
发文量
327
审稿时长
5.6 months
期刊介绍: Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.
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