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Bulletin of Engineering Geology and the Environment

Erschienen in:

08.07.2020 | Original Paper

Weakening of mudstone fragments due to disintegration: an experimental investigation

verfasst von: Peiwu Shen, Huiming Tang, Dingjian Wang, Xuexue Su, Lei Huang

Erschienen in: Bulletin of Engineering Geology and the Environment | Ausgabe 10/2020

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Abstract

Red-bed mudstone is widely distributed throughout the Three Gorges Reservoir Area, China. This geological material easily disintegrates into fragments during engineering activities. The potential factors that influence the disintegration (grain composition, slake durability index, grain roundness, fractal dimension, and surface energy) and shear strength (cohesion and friction angle) of red-bed mudstone fragments are investigated via cyclic wetting and drying tests and direct shear tests. The results show that the disintegration process includes three stages and that the grains gradually become well graded. The roundness exhibits a linear relationship with the number of cycles. However, the variations in the slake durability index, fractal dimension (mass-size distribution based), surface energy, cohesion, and friction angle show three distinct stages. In addition, the fractal dimension (quantity-size distribution based) and friction angle are significantly affected by the assumption that the specimens are isotropic, and the grain behaviors involve compaction, rotation, and separation. The cohesion and friction angle display linear relationships with the slake durability index, roundness, fractal dimension (mass-size distribution based), and surface energy, indicating the potential to assess the shear strength of mudstone fragments from the aspect of disintegration.

Vorheriger Artikel Petrophysical and acoustic assessment of carbonate rocks, Zahle area, central Lebanon

Nächster Artikel Artificial microcracking of granites subjected to salt crystallization aging test

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Titel: Weakening of mudstone fragments due to disintegration: an experimental investigation
verfasst von: Peiwu Shen
Huiming Tang
Dingjian Wang
Xuexue Su
Lei Huang
Publikationsdatum: 08.07.2020
Verlag: Springer Berlin Heidelberg
Erschienen in: Bulletin of Engineering Geology and the Environment / Ausgabe 10/2020
Print ISSN: 1435-9529
Elektronische ISSN: 1435-9537
DOI: https://doi.org/10.1007/s10064-020-01874-z

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