The effect of the replacement of Portland cement by ground granulated blast-furnace slag (GGBFS) on the performance of fine-grained concrete (FGC) was evaluated in this study. A densified mixture design algorithm (DMDA) was used to design the FGC mixture proportions, in which GGBFS was used to partially replace cement by 0 – 50% (with an interval of 10%). The performance of the FGC was evaluated in both fresh and hardened stages. Test results show that the FGC exhibited good workability with slump values in the ranges of 25 – 27 cm. In addition, the replacement of cement by GGBFS slightly affected the unit weight of the fresh FGC mixtures and provided a positive effect in significantly reducing the drying shrinkage of the concrete. At the replacement ratio of up to 30% cement, the compressive strength of the FGC samples was found to be increased and the water absorption was reduced significantly. Further increasing the GGBFS contents to 40% and 50% caused the reduction in compressive strength and the increase in water absorption of the samples. This study found that 30% was the optimal cement replacement level, where the FGC samples obtained the highest compressive strength value and the lowest water absorption rate of about 44 MPa and 6%, respectively.