During recent decades, the aim of transferring ground granulated blast furnace slag (GBFS) from a waste material into
an advantageous construction material has received significant attention. In this study, natural dolomite, CaMg(CO ), powder burned at a complete decarbonation temperature (about 900 °C) is referred to as calcined dolomite (CD). This powder could be used as an activator for the GBFS to form an eco-friendly cementitious material. From the previous study, the optimum amount of CD as slag activator was found at 20 wt%. This study explored both of the fresh and hardened properties of self-consolidating concrete (SCC) of two mixtures prepared by mixing weight ratio of CD:(CD + GBFS) in a percentage equal to 10 and 20 wt% and one ordinary Portland cement (OPC) based mixture with equivalent strength as a control set. The mechanical properties of SCCs including workability, compressive strength, splitting tensile strength, the volume of permeable voids, and water absorption. The results showed that the mixture with 20 wt% of CD reached the 28-day compressive strength of 35.75 MPa, which was lower by 12.39% compared with OPCbased SCC. Based on Vicroads classification for the computed volume of permeable voids, the mixture with 20 wt% of CD can be classified as good concrete. Therefore, the eco-friendly SCC with 20 wt% of CD has exceeded the minimum compressive strength requirement for concrete structural application with satisfactory durability.