Correlation of physical and mechanical properties with ultrasonic pulse velocities of sandstones in Çenedağ,  Kocaeli-Turkey

Nondestructive tests, commonly employed in rock mechanics, estimate mechanical parameters without affecting the rocks in situ properties. This study evaluates non-destructive tests (ultrasonic pulse velocity and Schmidt hammer) for forecasting the strength and physical properties of commonly used rocks. Weathering grades and moisture content are provided as variables that produce variances in both non-destructive tests. The coefficient of determination (R²) and subsequent empirical equations for the best-fit trend line are calculated using a simple regression method. The ultrasonic pulse velocity is found to be more efficient in estimating most of the physical properties (specific gravity, porosity, water absorption, and dry density) of granite, marble, and sandstone, with high correlation coefficients. Whereas the Schmidt hammer is found to be more reproducible in determining the strength (compressive and tensile) of granite, marble, and sandstone. The student’s t-test proved the sensitivity and correctness of the acquired equations from the suggested correlations, and agreement was established between measured and estimated plots of strength and physical properties. Although the student’s t-test confirms that the performance of all empirical models established in this study are significant, any non-destructive test with a low R² value should be used with caution when estimating the studied properties.

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The Evaluation of Non-Destructive Tests for the Strength and Physical Properties of Granite, Marble, and Sandstone: A Case Study from North Pakistan

Ahmed

Ahmad

Janjuhah

et al. 2023

Quaternary

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The geotechnical properties of the oolitic ironstone formation, Wadi Halfa, North Sudan

Daoud¹,

Rashed²,

Elsharief³

et al. 2020

J. Geol. Min. Res.

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Wadi Halfa Oolitic Ironstone Formation (WHOIF) covers large areas around Wadi Halfa border town in Northern Sudan. The detrital framework grains of sandstone of WHOIF are composed of sub-angular to sub-rounded quartz grains followed by feldspars, lithic fragments, micas and heavy minerals. The dominant cementing materials are iron oxides, carbonate cement, and some clay minerals. Twelve block samples were carefully selected and collected from six sites to represent different parts of vertical lithofacies sections of the studied formation. The petrographical characteristics of the specimens were first studied and the specimens were then subjected to laboratory tests to determine some of their basic physical and engineering properties. The physical tests constituted unit weight, specific gravity and water absorption. The measured engineering properties included uniaxial compressive strength (UCS) and ultra-sonic pulse velocity (UPV). The UCS and UPV were measured for specimens parallel and perpendicular to the bedding planes of the studied samples. The geotechnical study shows that the UCS values of WHOIF generally range from strong 83.7 MPa to very strong 153.7 MPa for perpendicular direction to bedding planes. Very good statistical correlation coefficient was developed between UCS and UPV. Good correlation was obtained between water absorption, porosity and UPV. These relations indicated that a decrease in void ratio and porosity resulted in an increase in UCS and UPV. An increase in water absorption of sandstone yielded a decrease in ultrasonic pulse velocity and uniaxial compressive strength.

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Correlation of uniaxial compressive strength with the dynamic elastic modulus, P - wave velocity and S - wave velocity of different rock types

et al. 2019

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Knowing mechanical properties of rocks incorporated with ultrasonic waves velocities investigations provide a secure basis for mine modelling. Uniaxial compressive strength, dynamic elastic modulus and ultrasonic waves velocities are just some of the rock properties that indicate on presence of discontinuities, stratification and fissures of rocks. Determining the relationship of these rock properties testing the rock samples that are corresponding to different rock types extracted from different mineral deposits represents the core of this study. In this paper, we statistically analyzed measured and calculated rock properties. We established the connection between these parameters creating empirical correlation equations. Using least squares method and simple linear regression analysis, we defined correlation coefficients and also developed empirical correlation equations.

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Correlation of physical and mechanical properties with ultrasonic pulse velocities of sandstones in Çenedağ, Kocaeli-Turkey

Cited by 3 publications

References 3 publications

The Evaluation of Non-Destructive Tests for the Strength and Physical Properties of Granite, Marble, and Sandstone: A Case Study from North Pakistan

The Evaluation of Non-Destructive Tests for the Strength and Physical Properties of Granite, Marble, and Sandstone: A Case Study from North Pakistan

The geotechnical properties of the oolitic ironstone formation, Wadi Halfa, North Sudan

Correlation of uniaxial compressive strength with the dynamic elastic modulus, P - wave velocity and S - wave velocity of different rock types

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