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Point load tests and strength measurements for brittle spheres

International Journal of Rock Mechanics and Mining Sciences, 2009
A multiaxial failure criterion for brittle materials is applied to a stress field analysis of a perfectly elastic sphere subjected to diametrically opposite normal forces that are uniformly distributed across small areas on the sphere's surface. Expressions are obtained for an intrinsic strength parameter of the material, as well as its unconfined ...
Russell, A.R., Muir Wood, David
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Improvements in the determination of point load strength

Bulletin of Engineering Geology and the Environment, 1985
The 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.
W R Dearman, Dearman W R
exaly   +2 more sources

Point-load strength: An index for classification of rock material

Bulletin of Engineering Geology and the Environment, 1991
Point-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
exaly   +2 more sources

Summary of the Transformational Relationship between Point Load Strength Index and Uniaxial Compressive Strength of Rocks

Sustainability, 2022
The point load test is an effective and rapid way to predict rock strength. Regarding the investigation of point load strength and the failure characteristics of rock, the point load test’s advantages and application scopes are introduced in this ...
Jianguo Li
exaly   +2 more sources

Point Load Strength Index of Half-Cut Core Specimens and Correlation with Uniaxial Compressive Strength

Rock Mechanics and Rock Engineering, 2020
The point load strength index is a widely used index in rock engineering, and cylindrical core and irregular shaped specimens are used in its determination.
Merve Şahin, Reşat Ulusay, Hasan Karakul   +2 more
exaly   +2 more sources

Point Load Test for Estimation of Concrete Compressive Strength

ACI Materials Journal, 1989
The point-load index is presented as a convenient alternate method for determining relative strength of concrete or as a method of estimating concrete compressive strength.
Richardson, David Newton
openaire   +2 more sources

Estimation of uniaxial compressive strength from point load strength, Schmidt hardness and P-wave velocity

Bulletin of Engineering Geology and the Environment, 2008
Uniaxial compressive strength is considered one of the most important parameters in the characterization of rock material in rock engineering practice. The study investigated correlations between uniaxial compressive strength and point load index, P-wave
İBrahim Cobanoglu, Sefer Beran Çelik, Cobanoglu Ibrahim   +2 more
exaly   +2 more sources

The point-load strength test

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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Investigating the Accuracy of Specimen Shape for Point Load Index Test in Predicting the Uniaxial Compressive Strength for Rocks Using Regression Analysis and Machine Learning

Mining, Metallurgy and Exploration, 2023
The strength of rocks and soil is a crucial design parameter in engineering projects, and it can be determined through various test methods such as uniaxial compressive strength, tensile strength, and shear strength.
Deniz Akbay
exaly   +2 more sources

Suggested method for determining point load strength

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1985
Description de l'appareil d'essais d'echantillons de roche.
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