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Comparison of Test Methods for Determining the Tensile Strength of Soil and Weak Rocks

Wang, Rong ; Li, Yanrong ; Lv, Dongdong ; Zhao, Weichao ; Zhang, Chaobo ; Zachert, Hauke ; Eichhoff, Gerald ; Beroya-Eitner, Mary Antonette (2022):
Comparison of Test Methods for Determining the Tensile Strength of Soil and Weak Rocks. (Publisher's Version)
In: Frontiers in Earth Science, 10, Frontiers Media S.A., e-ISSN 2296-6463,
DOI: 10.26083/tuprints-00021151,

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Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Comparison of Test Methods for Determining the Tensile Strength of Soil and Weak Rocks
Language: English

Tensile strength is a key parameter governing tensile cracking and subsequent failure of soil or rock mass. Existing methods for measuring tensile strength are mainly designed for hard materials and come with inherent problems. As such, they are continuously being adapted and improved by the scientific community. In line with this effort, we recently developed two new tensile test methods for application to soil and weak rocks, namely, the inner hole fracturing test (IHFT) and horizontal compression test (HCT). In this study, we compared the performance of these newly developed methods and the three most commonly used approaches for tensile strength determination, namely, the uniaxial direct tensile test (UDTT), Brazilian test (BT) and three-point bending test (TPBT). Results show that IHFT and HCT exhibit distinct advantages over the three conventional methods when testing soil and weak rocks: first, IHFT and HCT can overcome the eccentric force problem that is a main challenge in UDTT and BT, and second, results obtained from these tests are highly reproducible and stable. Between IHFT and HCT, the latter is found more suitable for routine laboratory testing because of simpler and easier procedure, more stable and reliable results and uniform stress distribution within specimens.

Journal or Publication Title: Frontiers in Earth Science
Volume of the journal: 10
Place of Publication: Darmstadt
Publisher: Frontiers Media S.A.
Collation: 12 Seiten
Uncontrolled Keywords: tensile strength, test methods, test apparatus, soil and weak rock, comparison
Classification DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften
600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute of Geotechnics
Date Deposited: 09 May 2022 13:34
Last Modified: 30 Sep 2022 06:20
DOI: 10.26083/tuprints-00021151
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-211513
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21151
PPN: 499794427
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