Influence of the geometry and reinforcement content of specimens on frost de-icing salt resistance of concrete

Within an extensive research project experiments on conventional and high-strength bridge pavement concretes have been carried out to investigate the influence of the geometry (slabs in comparison to cylindrical cores) and reinforcement content of specimens on the frost de-icing salt resistance according to the so-called CDF-test(1). With the help of experiments it was investigated whether drilled cores with and without reinforcement taken out of different outdoor-stored and air-entrained bridge pavement concretes allow a reliable statement in comparison to the scaling determined on laboratory test slabs made of the same concretes. In general, a coherent verification of the test procedures should be made under practical conditions. Four different air-entrained bridge pavement concretes mixed in four different ready-to-use concrete plants were put into trial plates where from cores have been drilled. For the other specimens (slabs and cylinders) Moulds were filled with the same concretes.