In situ application of high and ultra high strength concrete

High strength concrete (HSC) and ultra-high strength concrete (UHSC) have become today highly required due to their enhanced properties in terms of strength and durability. An experimental program was executed at BME, Department of Construction Materials and Technologies in order to evaluate the mechanical properties of HSC and UHSC mixtures including supplementary cementitious materials (SCM) such as silica fume and metakaolin, to achieve the optimal mixture for site applications. Compressive strength was evaluated at different ages. Variable parameters were the amount of water, cement and SCM. Several alterations were performed to reach the required strength by the designers. Based on the laboratory experiment results, the most effective replacement amount of cement is 8% for SF and 17% for MK.