Estimation of uniaxial compressive strength of very low-medium abrasive rocks from Cerchar abrasiveness index

Cerchar Abrasiveness Index (CAI) is one of the commonly used methods for determining rock abrasiveness. The main parameters that affect abrasion are density, cementation, strength properties and amount of abrasive minerals in the rock etc. In this study, 15 different tests including uniaxial compressive strength (UCS) and CAI were performed on 35 different rocks with low-medium abrasive properties. UCS and CAI values of 35 rocks used in the study are ranged between 6.64 to 148.36 MPa and 0.68 to 2.67 respectively. All of the rocks are classified below the medium abrasiveness class according to CAI classification. The main purpose of the study is to estimate the UCS value which is known as the most commonly used rock feature by CAI values. For this purpose, it was tried to estimate UCS values by multiple regression method using CAI and other test parameters. The results of the study show that there are significant relationships between UCS and CAI.