This study examines the strength properties use of talc as a substitute for OPC-GGBFS cement. The test was carried out by replacing the plain mix(OPC : GGBFS = 50 : 50) with talc at the rate of 0~100%. The OPC contents was constant in all mixtures. The mixtures replaced GGBFS with talc. The results showed that the compressive strength and bending strength decreases with an increase in talc contents.