Scale Effect and Correlation between Uniaxial Compressive Strength and Point Load Index for Limestone and Travertine

Determining the uniaxial compressive strength of intact rock is primary objective a geomechanical project, and reliable estimate in early phases saves time costs for more sophisticated laboratory tests. The problem knowing which correlations between resistance to compression point load index are reliable, those that cover one or several types (depending on type statistical adjustment). In this work, they were evaluated with respect limestone travertine from experimental results, models scale effect determined, being estimated reported literature. model was ascending (strength increases as diameter increases), while descending decreases obtaining similar exponents equations modeled both cases.