The relationship between uniaxial compressive strength and degradation was investigated for selec... more The relationship between uniaxial compressive strength and degradation was investigated for selected rock types, by using regression analyses to determine whether degradation was a useful predictor of compressive strength. In addition, the effects of aggregate particle size, ...
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1990
Eight sandstones, three limestones, one dolomite, one marble and one syenitic gneiss were tested ... more Eight sandstones, three limestones, one dolomite, one marble and one syenitic gneiss were tested to evaluate the correlations between the compressive strength values, as determined by the standard uniaxial compression test, and the corresponding results of the point load, the Schmidt hammer, the Los Angeles abrasion, and the slake durability tests. Ten cores of each rock type were used for the uniaxial compression, point load and Schmidt hammer tests, whereas an average of three tests for each rock type was used to determine the Los Angeles abrasion loss and the slake durability indices. Results indicate that strong linear correlations exist between the results of uniaxial compression vs the point load and Schmidt hammer tests, the correlation for the Schmidt hammer being dependent on rock type. The correlation between uniaxial strength and the Los Angeles abrasion loss in non-linear but becomes linear when a log-log scale is used. The slake durability index does not exhibit a significant correlation with the uniaxial strength for the rocks tested. The correlation equations for predicting compressive strength using different methods are presented along with their confidence limits. All empirical tests used, other than the slake durability test, provide reliable estimates of compressive strength, with Schmidt hammer slightly underestimating at higher strength (> 150 MPa).
The relationship between uniaxial compressive strength and degradation was investigated for selec... more The relationship between uniaxial compressive strength and degradation was investigated for selected rock types, by using regression analyses to determine whether degradation was a useful predictor of compressive strength. In addition, the effects of aggregate particle size, ...
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1990
Eight sandstones, three limestones, one dolomite, one marble and one syenitic gneiss were tested ... more Eight sandstones, three limestones, one dolomite, one marble and one syenitic gneiss were tested to evaluate the correlations between the compressive strength values, as determined by the standard uniaxial compression test, and the corresponding results of the point load, the Schmidt hammer, the Los Angeles abrasion, and the slake durability tests. Ten cores of each rock type were used for the uniaxial compression, point load and Schmidt hammer tests, whereas an average of three tests for each rock type was used to determine the Los Angeles abrasion loss and the slake durability indices. Results indicate that strong linear correlations exist between the results of uniaxial compression vs the point load and Schmidt hammer tests, the correlation for the Schmidt hammer being dependent on rock type. The correlation between uniaxial strength and the Los Angeles abrasion loss in non-linear but becomes linear when a log-log scale is used. The slake durability index does not exhibit a significant correlation with the uniaxial strength for the rocks tested. The correlation equations for predicting compressive strength using different methods are presented along with their confidence limits. All empirical tests used, other than the slake durability test, provide reliable estimates of compressive strength, with Schmidt hammer slightly underestimating at higher strength (> 150 MPa).
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Papers by Abdul Shakoor