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<p>The uniaxial compressive strength (UCS) is an essential parameter for studying geotechnical and geomechanical properties, particularly in the context of rock slope stability. However, obtaining intact rock specimens with standardized dimensions is frequently difficult, especially for altered or fractured rocks, leading to the use the Point Load Strength (PLS or I<sub>S50</sub>) and non-destructive methods, including ultrasonic P-wave velocity measurements and density (ρ). This study aims to establish empirical correlations between I<sub>S50</sub>, UCS, density and P-wave velocity, obtained from Pliocene limestone samples collected from the excavation face in the Meknes area, Morocco. To reach this purpose, the experimental laboratory tests were conducted in accordance with American Society for Testing and Materials (ASTM), International Society for Rock Mechanics (ISRM) Standards and French Standardization Association (AFNOR). The statistical regression analysis of the results reveals significant and reliable correlations between these parameters. It provides practical approaches for the efficient estimation of the mechanical strength of limestone in this geological context, where conventional testing is limited and serve as a valuable reference for future research on the carbonate formations of the Meknes region.</p>

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Geomechanical Characterization and Empirical Correlations for Pliocene Limestone

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Abdelouahed Essaied,
  • Mohamed Rouai,
  • Abdelilah Dekayir

摘要

The uniaxial compressive strength (UCS) is an essential parameter for studying geotechnical and geomechanical properties, particularly in the context of rock slope stability. However, obtaining intact rock specimens with standardized dimensions is frequently difficult, especially for altered or fractured rocks, leading to the use the Point Load Strength (PLS or IS50) and non-destructive methods, including ultrasonic P-wave velocity measurements and density (ρ). This study aims to establish empirical correlations between IS50, UCS, density and P-wave velocity, obtained from Pliocene limestone samples collected from the excavation face in the Meknes area, Morocco. To reach this purpose, the experimental laboratory tests were conducted in accordance with American Society for Testing and Materials (ASTM), International Society for Rock Mechanics (ISRM) Standards and French Standardization Association (AFNOR). The statistical regression analysis of the results reveals significant and reliable correlations between these parameters. It provides practical approaches for the efficient estimation of the mechanical strength of limestone in this geological context, where conventional testing is limited and serve as a valuable reference for future research on the carbonate formations of the Meknes region.