A comprehensive investigation of crack damage anisotropy in Cobourg limestone and its effect on the failure envelope

E. Ghazvinian, M. Perras, C. Langford, M. Diederichs, D. Labrie

In the proceedings of: GeoMontréal 2013: 66th Canadian Geotechnical Conference; 11th joint with IAH-CNC

Session: Soil and Rock Mechanics V

ABSTRACT: Crack damage anisotropy in the Cobourg limestone has been studied to understand the effect of argillaceous wisps and blebs (that mark the irregular apparent bedding) on the fabric-guided micro-fracturing phenomenon in argillaceous limestone. For this purpose a detailed testing program was carried out that includes uniaxial (Unconfined Compressive Strength or UCS), triaxial and indirect tensile (Brazilian) tests for five sets of specimens with different fabric orientations. The results are presented in this paper.

RÉSUMÉ: des bandes foliées et des intrusions argileuses (qui forment le litage apparent irrégulier du calcaire) sur le phénomène de micro-fracturation liée à la texture dans les calcaires argileux. A cet effet, un programme d'essais détaillé a été réalisé lequel comprend des essais uniaxiaux (essais de résistance en compression non confinée ou C0), triaxiaux et de tension indirecte (essai brésilien) sur cinq séries d'échantillons avec différentes orientations de texture. Les résultats sont présentés dans le présent document.

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