Abstract
In engineering applications of rock materials, predicting the uniaxial compressive strength (UCS) is essential, particularly in the preliminary stage of a project. The UCS of rock materials is profoundly affected by the rock type, porosity, grain size, water content, etc. The rigor and cost of sampling as well as sample preparation are more than those of the Brazilian (indirect tensile strength, ITS) and 2nd cycle of slake durability index (Id2) tests. Therefore, ITS or Id2 values can be used to predict the UCS value of rocks through correlation. In this study, evaporitic rocks from Al Ain, United Arab Emirates (UAE) were examined. Forty-eight representative rock blocks were collected, while avoiding anisotropy effects of thinly bedded rocks along with the gypsiferous layers. The relations between UCS and ITS and UCS and Id2 were estimated with representative empirical equations. Results reveal moderate correlation between them. Moreover, Student’s t and F tests show that there is a significant correlation between UCS and ITS and Id2. Further, the fit between the predicted and measured values was evaluated in terms of the 1:1 line, a good index to confirm the reliability of the empirical relationship. Finally, the study demonstrates that ITS or Id2 can estimate the UCS of evaporitic rocks within a certain correlation coefficient, R.
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The datasets generated and/or analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgments
The author would like to express sincere appreciation to Prof. Ala Aldahan, Dr. Osman Abdelghany, Dr. Mahmoud Abu Saima, and Dr. Bahaa Al-deen for their valuable insights, interpretations, and comments on mineralogical and textural studies on rock samples. Special thanks to research assistants, technicians, graduates, and undergraduate students of my University in the field and in the laboratory.
Funding
The United Arab Emirates University, Research Affairs, financially supported this research under the title of UPAR 2016–31S252 program.
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Arman, H. Correlation of Uniaxial Compressive Strength with Indirect Tensile Strength (Brazilian) and 2nd Cycle of Slake Durability Index for Evaporitic Rocks. Geotech Geol Eng 39, 1583–1590 (2021). https://doi.org/10.1007/s10706-020-01578-x
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DOI: https://doi.org/10.1007/s10706-020-01578-x