Influence of Soil Particle Size on the Engineering Properties and Microstructure of a Red Clay

Particle size exerts a significant influence on the mechanical behavior of soil. However, insufficient research has been carried out on red clay formations, which are widespread in some Chinese provinces. Here, using unconfined compressive strength (UCS) tests, wetting–drying (WD) tests, and low-tem...

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Autores principales:	Yongwei Wang, Kunyao Li, Jiaming Li, Shibin Tang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	red clay particle size effect specific surface area pore engineering characteristic 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/9769d595def7455393f7ae5a9e6729b8
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spelling	oai:doaj.org-article:9769d595def7455393f7ae5a9e6729b82021-11-25T16:39:52ZInfluence of Soil Particle Size on the Engineering Properties and Microstructure of a Red Clay10.3390/app1122108872076-3417https://doaj.org/article/9769d595def7455393f7ae5a9e6729b82021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10887https://doaj.org/toc/2076-3417Particle size exerts a significant influence on the mechanical behavior of soil. However, insufficient research has been carried out on red clay formations, which are widespread in some Chinese provinces. Here, using unconfined compressive strength (UCS) tests, wetting–drying (WD) tests, and low-temperature nitrogen adsorption tests, we examined the relationship between the particle size and a number of mechanical and microstructural characteristics of a red clay outcropping at a construction site in China. Our results suggest that, depending on the surface area, porosity, particle size, and dry density, the failure mechanism in UCS tests will be different. That is, as the particle size increases, the failure mode of soil changes from split failure into shear failure. In addition, as the dry density increases, the UCS of the soil sample is significantly improved, and its total porosity and fractal dimension decrease. We also evaluated a dependence on particle size and the number of WD cycles on the distribution and size of cracks in WD tests. We conclude by suggesting that particle size, dry density, and WD behavior should all be taken into account in roadbed designs in red clay formations.Yongwei WangKunyao LiJiaming LiShibin TangMDPI AGarticlered clayparticle size effectspecific surface areaporeengineering characteristicTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10887, p 10887 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	red clay particle size effect specific surface area pore engineering characteristic Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	red clay particle size effect specific surface area pore engineering characteristic Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Yongwei Wang Kunyao Li Jiaming Li Shibin Tang Influence of Soil Particle Size on the Engineering Properties and Microstructure of a Red Clay
description	Particle size exerts a significant influence on the mechanical behavior of soil. However, insufficient research has been carried out on red clay formations, which are widespread in some Chinese provinces. Here, using unconfined compressive strength (UCS) tests, wetting–drying (WD) tests, and low-temperature nitrogen adsorption tests, we examined the relationship between the particle size and a number of mechanical and microstructural characteristics of a red clay outcropping at a construction site in China. Our results suggest that, depending on the surface area, porosity, particle size, and dry density, the failure mechanism in UCS tests will be different. That is, as the particle size increases, the failure mode of soil changes from split failure into shear failure. In addition, as the dry density increases, the UCS of the soil sample is significantly improved, and its total porosity and fractal dimension decrease. We also evaluated a dependence on particle size and the number of WD cycles on the distribution and size of cracks in WD tests. We conclude by suggesting that particle size, dry density, and WD behavior should all be taken into account in roadbed designs in red clay formations.
format	article
author	Yongwei Wang Kunyao Li Jiaming Li Shibin Tang
author_facet	Yongwei Wang Kunyao Li Jiaming Li Shibin Tang
author_sort	Yongwei Wang
title	Influence of Soil Particle Size on the Engineering Properties and Microstructure of a Red Clay
title_short	Influence of Soil Particle Size on the Engineering Properties and Microstructure of a Red Clay
title_full	Influence of Soil Particle Size on the Engineering Properties and Microstructure of a Red Clay
title_fullStr	Influence of Soil Particle Size on the Engineering Properties and Microstructure of a Red Clay
title_full_unstemmed	Influence of Soil Particle Size on the Engineering Properties and Microstructure of a Red Clay
title_sort	influence of soil particle size on the engineering properties and microstructure of a red clay
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9769d595def7455393f7ae5a9e6729b8
work_keys_str_mv	AT yongweiwang influenceofsoilparticlesizeontheengineeringpropertiesandmicrostructureofaredclay AT kunyaoli influenceofsoilparticlesizeontheengineeringpropertiesandmicrostructureofaredclay AT jiamingli influenceofsoilparticlesizeontheengineeringpropertiesandmicrostructureofaredclay AT shibintang influenceofsoilparticlesizeontheengineeringpropertiesandmicrostructureofaredclay
_version_	1718413090812329984

Influence of Soil Particle Size on the Engineering Properties and Microstructure of a Red Clay

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