Concrete is a composite material and its properties depend on the properties of its compo-nents as well as on the interaction between them. In this thesis, the focus is increasingly placed on one of these components, the aggregate. On average, the European Union has an annual increasing percentage of crushed aggre-gates and a further falling gravel and sand content every year. This makes it clear that crushed stone will play a major role in the future. Therefore, a comprehensive series of concrete tests with each different aggregates is con-ducted to determine material properties. In particular, the influence of the grain shape and the type of aggregate in terms of strength development is examined. For the experiments are used crushed stone aggregates (dolomite and limestone) from Croatia and uncrushed aggregates (quartz gravel) from Austria. By accomplishing compres-sion, splitting tensile, static modulus of elasticity and cut-through-tensile tests at 2, 7 and 28 days long storing specimens, some results could be lead off on the influence of the grain shape as well as on the influence of the rock type.