In the present work, a study of the tensile mechanical behavior of a set of twelve selected
granite lithotypes is carried out. Some petrographic aspects such as grain size and presence of
planar anisotropy explain the variation on the parameters that characterize the tensile
behavior, like the strength and fracture energy. Other factors that influence the tensile
mechanical behavior, such as weathering degree and physical properties like porosity and
density, are also analyzed. Statistical correlations between the ultrasonic pulse velocity and
the mechanical and physical properties are proposed
