Results 231 to 240 of about 7,295,630 (273)
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International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1972
Abstract An index test for strength classification of rock materials is described. The test uses portable equipment. Specimens require no machining and can take the form of either rock core or irregular lumps. A single ‘point-load strength index’ can be obtained whatever the shape of specimen, provided that this shape is maintained within prescribed ...
E. Broch, J.A. Franklin
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Abstract An index test for strength classification of rock materials is described. The test uses portable equipment. Specimens require no machining and can take the form of either rock core or irregular lumps. A single ‘point-load strength index’ can be obtained whatever the shape of specimen, provided that this shape is maintained within prescribed ...
E. Broch, J.A. Franklin
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Improvements in the determination of point load strength
Bulletin of Engineering Geology and the Environment, 1985The point load test, developed over the last two decades, provides a practical and cheap method for laboratory or field determination of rock strength. Because of the size dependence of the test, results are corrected to a standard thickness of 50 mm and the resultant I(50) values may be used to estimate uniaxial compressive strength.
N. Turk, W. R. Dearman
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The determination of uniaxial compressive strength from point load strength for pyroclastic rocks
Engineering Geology, 2014Abstract The point load test has often been reported as an indirect measure of compressive strength. It has been used widely in practice due to easy testing, the simplicity of specimen preparation, and possible field applications. Many researchers have investigated the relation between uniaxial compressive strength (UCS) and point load index (Is) for
Şair Kahraman
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Suggested method for determining point load strength
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1985Description de l'appareil d'essais d'echantillons de roche.
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Study on the Relation between Uniaxial Compressive Strength and Point Load Strength
Applied Mechanics and Materials, 2014In order to investigate the relation between uniaxial compressive strength and point load strength, several homogeneous rock specimens were tested, and the influence of the different rock type was investigated using regression analysis and the derived equations were statistically tested.
Rui Hong Wang +3 more
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The point-load strength test for concrete cores
Magazine of Concrete Research, 1980Synopsis The point-load test, commonly used in geotechnical practice, is evaluated for application in concrete testing. The method uses portable equipment to test concrete cores which require no further preparation after removal from the structure.
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Point-load strength: An index for classification of rock material
Bulletin of Engineering Geology and the Environment, 1991Point-load strength (Is) as a measure for the determination of rock strength and for estimating uniaxial (unconfined) compressive strength (UCS) are described and both put together and used for rock strength classification of brittle and hard rocks. The estimated point-load strength values of specimens of varying sizes and also the values corrected to ...
D. K. Ghosh, M. Srivastava
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The Point Load Test for the Tensile Strength of Rock
Geotechnical Testing Journal, 1980Abstract The theoretical background is presented for the point load test for determining the tensile strength of rock materials. Theoretical predictions of the dependence of fracture force on sample shape (in this case, spheres and cylinders) are shown to agree quite well with experimental data for Plexiglas® and rock materials.
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Study on Rock Strength Characteristic by Point Load Test
Applied Mechanics and Materials, 2014Test point load test requires relatively small load, its instrument is portable, it can be easily applied to on-site testing,which may pave the way for the development of the fieldstrength of rock mechanics test, widely promoted in engineering construction, has a large space for development.
Rui Hong Wang +3 more
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Estimation of strength anisotropy using the point-load test
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1983Abstract As most rocks are of an anisotropic nature, the measurement of the ratio between the maximum and minimum strength, i.e. the strength anisotropy, is of general interest. To measure the strength anisotropy by the uniaxial compression test, core specimens drilled in different directions are needed.
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