Geomechanics and Engineering

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Ultrasonic velocity as a tool for mechanical and physical parameters prediction within carbonate rocks

  • Abdelhedi, Mohamed (Universite de Sfax Faculte des Sciences de Sfax, Route de Soukra, Departement des Sciences de la Terre) ;
  • Aloui, Monia (Universite de Sfax Faculte des Sciences de Sfax, Route de Soukra, Departement des Sciences de la Terre) ;
  • Mnif, Thameur (Universite de Sfax Faculte des Sciences de Sfax, Route de Soukra, Departement des Sciences de la Terre) ;
  • Abbes, Chedly (Universite de Sfax Faculte des Sciences de Sfax, Route de Soukra, Departement des Sciences de la Terre)
  • Received : 2016.07.21
  • Accepted : 2017.03.15
  • Published : 2017.09.25
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Abstract

Physical and mechanical properties of rocks are of interest in many fields, including materials science, petrophysics, geophysics and geotechnical engineering. Uniaxial compressive strength UCS is one of the key mechanical properties, while density and porosity are important physical parameters for the characterization of rocks. The economic interest of carbonate rocks is very important in chemical or biological procedures and in the field of construction. Carbonate rocks exploitation depends on their quality and their physical, chemical and geotechnical characteristics. A fast, economic and reliable technique would be an evolutionary advance in the exploration of carbonate rocks. This paper discusses the ability of ultrasonic wave velocity to evaluate some mechanical and physical parameters within carbonate rocks (collected from different regions within Tunisia). The ultrasonic technique was used to establish empirical correlations allowing the estimation of UCS values, the density and the porosity of carbonate rocks. The results illustrated the behavior of ultrasonic pulse velocity as a function of the applied stress. The main output of the work is the confirmation that ultrasonic velocity can be effectively used as a simple and economical non-destructive method for a preliminary prediction of mechanical behavior and physical properties of rocks.

Keywords

Acknowledgement

Supported by : Ministere de l'Enseignement Superieur et de la Recherche Scientifique enTunisie

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