Estimation of uniaxial compressive and indirect tensile strengths of intact rock from Schmidt hammer rebound number

Abstract A number of destructive and non-destructive tests were conducted on rock samples collected from various zones in northern Iraq. So far, for Iraqi rocks, few studies have correlated Schmidt hammer rebound ( R ) with both unconfined compressive strength (UCS) Brazilian tensile (BTS). In this study, the objective is to develop a relationship between surface hardness (rebound number) BTS different types rocks. The required should be based measured values UCS, BT, hardness. To determine UCS BTS, 120 intact prepared tested using uniaxial test machine, apparatus, an L-type Three (sandstone, claystone, limestone) several locations Iraq (Domeez, Baadra, Zawita). For three new linear correlation high value regression coefficient 2 presented, linking separately versus . rocks studied, better than (BTS)