Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/155895
Title: Tensile strength of unsaturated coarse and fine-grained soils
Authors: Bulolo, Sam
Leong, Eng Choon
Kizza, Richard
Keywords: Engineering::Civil engineering
Issue Date: 2021
Source: Bulolo, S., Leong, E. C. & Kizza, R. (2021). Tensile strength of unsaturated coarse and fine-grained soils. Bulletin of Engineering Geology and the Environment, 80(3), 2727-2750. https://dx.doi.org/10.1007/s10064-020-02073-6
Journal: Bulletin of Engineering Geology and the Environment
Abstract: Soils at the ground surface experience multiple cycles of drying and wetting. On drying, the soils experience shrinkage and cracks may appear. The development of cracks depends on the tensile strength of the soil. Such cracks increase the permeability of the soil and can cause slopes and earth structures to fail due to rainfall. Several tensile strength models have been proposed for unsaturated soils considering the effect of matric suction. However, the tensile strength models proposed are for either cohesionless (coarse-grained) or clayey (fine-grained) soils. The tensile strength models were shown to be different in their definition of suction stress and the presence or absence of a cohesion term. As tensile strength data of fine-grained soils with the same soil structure and soil–water characteristic curve (SWCC) data are lacking in the literature, Brazilian tensile tests and SWCC tests were conducted on compacted fine-grained soils from two residual soil formations. The test data highlighted the problem in the friction angle used in existing tensile strength models. Using a general form of the suction stress and the extended Mohr–Coulomb criterion with the Brazilian test Mohr circle, a new tensile strength model applicable to both coarse-grained and fine-grained soils was proposed. The proposed model was shown to perform better than existing models using independent data.
URI: https://hdl.handle.net/10356/155895
ISSN: 1435-9529
DOI: 10.1007/s10064-020-02073-6
Rights: © 2021 Springer-Verlag GmbH Germany, part of Springer Nature. This is a post-peer-review, pre-copyedit version of an article published in Bulletin of Engineering Geology and the Environment. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10064-020-02073-6.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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