Analysis and comparison of rock strength properties of calcarenite, acquired by needle penetration, unconfined compression and shear box tests

This study focuses on three different, often used methods to determine rock strength: needle penetration, unconfined compression and shear box tests. The investigations were done on calcarenite that was taken directly from the construction site of the new A2 highway tunnel in Maastricht, the Netherlands. Besides determining the strength, it was...