The Effect of Loading Rate on the Compressive and Tensile Strength of Rocks

This paper presents the results of uniaxial compressive and tensile test for two different kind of granites. The test were conducted by the complex liquid-gas pressure system under the loading rate from 1 × 10-1 （kg · cm-2） · s-1 to 1 × 10⁵（kg · cm-2） · s-1. The results of test show that compressive and tensile failure strength of rocks notably increase with the rate of loading of specimens. Also, the strength ratio of compression-tension of rocks is not a constant. It increase slightly with the loading rate.