ABSTRACT
ABSTRACT: Point load index is used in the classification by the strength of the rocks, strength parameter of the rock materials in some rock mass classification systems, also to determine indirectly the other strength parameters such as uniaxial compressive strength and tensile strength. However, at the present time it is not recommended using of point load index to determine indirectly the uniaxial compressive strength and tensile strength because of the drawbacks of the test method. The point load index test is based on the principle that rock sample is broken between two conical platens. Failure load and specimen dimensions are used to calculate the point load strength index.
