Journal Published Online: 09 September 2020
Volume 43, Issue 6

A New Direct Tension Test Method for Soils and Soft Rocks

CODEN: GTJODJ

Abstract

Tensile strength plays a crucial role in many engineering activities involving soils and soft rocks. Currently, several methods for tensile strength determination exist, the most common of which include the direct tension method, Brazilian test, ring test, axial fracturing test, bending test, and hydraulic fracturing test. However, outstanding problems associated with these methods, e.g., undesirable eccentric forces and damage of specimen ends, significantly affect obtained tensile strength values. To overcome these problems, we propose an alternative direct tension test method together with the newly developed apparatus. The proposed method uses an annular specimen that is tension-loaded on the inner hole. The method was evaluated through a series of tests on undisturbed soil and remolded gypsum-sand mixture specimens. For validation, comparison of results between the proposed method and the International Society for Rock Mechanics (ISRM)-suggested method was performed. Based on the results of the experimental program, the proposed method is considered more capable of and more suitable for determining the tensile strength of soils and soft rocks than the ISRM-suggested method.

Author Information

Li, Yanrong
Department of Earth Sciences and Engineering, Taiyuan University of Technology, Taiyuan, China
Guan, Fanfan
Department of Earth Sciences and Engineering, Taiyuan University of Technology, Taiyuan, China
Su, He
Department of Earth Sciences and Engineering, Taiyuan University of Technology, Taiyuan, China
Aydin, Adnan
Department of Geology and Geological Engineering, University of Mississippi, University, MS, USA
Beroya-Eitner, Mary Antonette
Institut und Versuchsanstalt für Geotechnik, Technische Universität Darmstadt, Raum, Darmstadt, Germany
Zachert, Hauke
Institut und Versuchsanstalt für Geotechnik, Technische Universität Darmstadt, Raum, Darmstadt, Germany
Pages: 18
Price: $25.00
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Details
Stock #: GTJ20190308
ISSN: 0149-6115
DOI: 10.1520/GTJ20190308