Tensile strength of rocks: comparison of different testing methods
Tensile strength of rocks: comparison of different testing methods
While direct tensile testing is widely acknowledged as the most accurate method of determining tensile strength, indirect methods are frequently employed, due to the problems and the precision required to obtain viable results with the direct method. Accurate values of tensile strength are very important, especially for design purposes. Thus, values obtained from the direct tensile test are beneficial and they should be compared to other experimental values measured with different methods. This study compares experimental results of standard methods of indirect tensile testing, such as the Brazilian (splitting tensile) test and three and four point bending flexural tests with the ones obtained from direct tensile testing performed following the ASTM standard. For the comparison, a highly isotropic and uniform rock, namely a Moleanos limestone, is used. Results show that bending tests produce higher values than those obtained using the Brazilian test, and in turn, the latter produces also slightly higher values than direct tensile testing.
Jorge Castro; Jon L. Justo; M. H. Olson; Marina Miranda
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
C - Risk analysis and safety evaluation
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