Influence de la lithologie sur le comportement m6canique des roches soumises ~t essais de compression simple et br6siliens (Influence of lithology on the mechanical behaviour of rocks in uniaxial compression and Brazilian tests). Eng. Geol., 6:31-42.
Uniaxial compression tests and Brazilian tests have been made on a set of trial rocks, the geological characteristics of which have been investigated. The influence of the principal geological parameter, namely lithology, on the mechanical behaviour of the rocky materials has been investigated. It has been found out that lithology directly conditions not only the resistance in traction and compression but also the kind of breaking in compression, the modulus of deformation, the modulus of elasticity and the sensibility with regard to saturation of water.
RESUME
Des essais de compression simple et des essais br6siliens ont 6t6 effectu6s sur une s6rie d'6prouvettes de roches dont les caract6ristiques g6ologiques ont 6t6 6tudi6es.
On a d6termin6 rinfluence du param6tre g6ologique principal, la lithologie, sur le comportement m6canique des mat6riaux rocheux. On constate que la lithologie conditionne directement outre la r6sistance en traction et compression, le mode de rupture en compression, le module de d6formation, le module d'61asticit6 et la sensibilit6 ~_ la saturation en eau.