IJIRST - International Journal for Innovative Research in Science & Technology
Helpful for & Research Area: Civil Engineering
Authors : Sachin Gupta; Dhirender Kumar; Arup Bandyopadhyay; S. L. Gupta
Volume 4 Issue - 9, 2018
KEYWORDS: Sandstone, Laboratory, UCS, Wave Velocity, Modulus, Correlation
ABSTRACT:
The objective of this paper is to explore correlations for predicting Uniaxial Compressive Strength and Tangent Modulus - on the basis of compression and shear waves' velocities - for three Himalayan sandstones and implications of using the proposed equations. In this paper, the discussion is done in five stages. First, the representative values of different properties and parameters have been discussed, to have an understanding about the three variants of the sandstone. Second, complete spread of the actual data is shown. Third, correspondence of these values with the equations proposed for sandstone by other researchers has been assessed. Forth, correlations have been explored through regression analysis. Fifth, the implication of using the proposed correlations has been assessed on the same data and the sandstone data of other researchers. This assessment of implication is done by: (1) plotting of actual UCS and estimated UCS from the correlations, (2) calculating percentage error in estimating UCS through these equations, and, (3) assessing variation in the estimated range of values to that of actual. This work reaffirms that the correlations are rock type and location specific that too with certain percentage of errors; in present case percentage of error varies from 30 to 40. However, for preliminary stage of a project, a broad picture of the rock can be obtained using these equations, in the form of range. But, these or any correlations can never be an alternative for the investigation.
