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http://dx.doi.org/10.14481/jkges.2014.15.2.53

Predicting the Uniaxial Compressive Strength and Young's Modulus of Rocks using Ultrasonic Velocity  

Choi, Gilhyun (Department of Civil Engineering, Kyungbuk College)
Baek, Seungcheol (Department of Civil Engineering, Andong National University)
Publication Information
Journal of the Korean GEO-environmental Society / v.15, no.2, 2014 , pp. 53-58 More about this Journal
Abstract
The uniaxial compressive strength and Young's modulus of intact rocks are the most important analytical parameters for design of rock mass structures. But the preparation of the samples for uniaxial compressive test is a hard and time consuming task. By using ultrasonic test, engineers can predict the analytical parameters that is the uniaxial compressive strength and Young's modulus. The uniaxial compressive test and ultrasonic test were carried out 115 samples of igneous rocks, 74 samples of metamorphic rocks and 55 samples of sedimentary rocks and, after regression analysis of the test results, best fit equations for predicting the uniaxial compressive strength and Young's modulus are proposed. In order to obtain a better correlations coefficient between uniaxial compressive strength and P-wave velocity, the P-wave velocity were multiplied by density values. The proposed equations for predicting uniaxial compressive strength and Young's modulus using ultrasonic test provide reliable results.
Keywords
Ultrasonic velocity; Rock; Uniaxial compressive strength; Young's modulus;
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