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Bulletin of Engineering Geology and the Environment

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01.09.2024 | Original Paper

Tensile strength and dilative characteristics of compacted unsaturated clay-sized metalliferous tailings for bulk earthworks

verfasst von: Hua Tian, David J. Williams, Keith Mandisodza

Erschienen in: Bulletin of Engineering Geology and the Environment | Ausgabe 9/2024

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Abstract

Lack of investigation into the tensile strength characteristics of unsaturated tailings hinders their recycling as construction materials in bulk earthworks. Here, the strength characteristics and strength-dilatancy relation in the tensile stress regime of unsaturated tailings were investigated via flattened Brazilian and direct shear tests. A nonlinear variation of tensile strength with water contents was observed. The unsaturated tailings with water contents below the plastic limit were strain softening and dilative under low normal stress. Furthermore, an analytical equation was proposed to predict the tensile strength of compacted tailings via the soil water characteristics curve (SWCC) and corroborated via experiments.

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Titel: Tensile strength and dilative characteristics of compacted unsaturated clay-sized metalliferous tailings for bulk earthworks
verfasst von: Hua Tian
David J. Williams
Keith Mandisodza
Publikationsdatum: 01.09.2024
Verlag: Springer Berlin Heidelberg
Erschienen in: Bulletin of Engineering Geology and the Environment / Ausgabe 9/2024
Print ISSN: 1435-9529
Elektronische ISSN: 1435-9537
DOI: https://doi.org/10.1007/s10064-024-03860-1

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