Performance of BFS concrete: k-Value concept versus equivalent performance concept

First, accelerated degradation tests were performed to investigate the resistance of Ordinary Portland cement (OPC) and BFS concrete against organic acids, carbonation, chloride ingress, sulphate attack (complete submersion) and the alkali-silica reaction. The cement replacement percentages varied from 50% to 85% and the influence of different curing periods was considered. The results showed that the performance of BFS concrete was better than that of OPC concrete, except for carbonation. Afterwards, the results were evaluated with the k-value concept and the equivalent performance concept. The latter method seemed to be the most promising one and application of the k-value concept, with respect to durability, seems to be ambiguous and laborious.