The effect of specimen size and stress rate for the Brazilian test—A statistical analysis |
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| Authors: | D A Newman D G Bennett |
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| Institution: | (1) Appalachian Mining and Engineering, Inc., Lexington, Kentucky, USA;(2) Lexington-Fayette Urban County Government, Lexington, Kentucky, USA |
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| Abstract: | Summary The Brazilian test is a widely accepted method for the determination of the tensile strength of intact rock. Specifications for the Brazilian tensile strength test have been established by the American Society for Testing and Materials (ASTM), ASTM D 3967-86 and a suggested approach is provided by the International Society for Rock Mechanics (ISRM). The ASTM and ISRM allow a relatively wide range of values for specimen geometry defined in terms of length to diameter ratio and loading rates defined as either time to failure or stress rate.A statistical study was carried out on a coal measure sandstone to determine whether the tensile strength determined by the Brazilian test is independent of the specimen geometry and the stress rate. |
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