A correlation between Schmidt hammer rebound numbers with impact strength index,slake durability index and P-wave velocity |
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| Authors: | P K Sharma Manoj Khandelwal T N Singh |
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| Institution: | (1) Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India;(2) Department of Mining Engineering, College of Technology and Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur, 313001, India;(3) Present address: Geological Survey of India, Jaipur, 302004, India; |
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| Abstract: | The main objective of this study was to establish statistical relationship between Schmidt hammer rebound numbers with impact
strength index (ISI), slake durability index (SDI) and P-wave velocity. These are important properties to characterize a rock
mass and are being widely used in geological and geotechnical engineering. Due to its importance, Schmidt hammer rebound number
is considered as one of the most important property for the determination of other properties, like ISI, SDI and P-wave velocity.
Determination of these properties in the laboratory is time consuming and tedious as well as requiring expertise, whereas
Schmidt hammer rebound number can be easily obtained on site which in addition is non-destructive. So, in this study, an attempt
has been made to determine these index properties in the laboratory and each index property was correlated with Schmidt hammer
rebound values. Empirical equations have been developed to predict ISI, SDI and P-wave velocity using rebound values. It was
found that Schmidt hammer rebound number shows linear relation with ISI and SDI, whereas exponential relation with P-wave
velocity. To check the sensitivity of empirical relations, Student’s t test was done to verify the correlation between rebound values and other rock index properties. |
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