5. Test results of marble dust modified concrete
5.1. Compressive strength (fc)
The cube compressive strength test results of concrete mix containing 0.0%, 5.0%, 7.5%, 10.0% and 15.0% marble dust as a partial replacement of cement by weight are given in Fig. 14. It is observed that in all levels of marble dust as a cement replacement, the concrete compressive strength slightly decreases. Most likely this is due to the reduction in cementing material (C3S and C2S) which is mainly responsible for concrete strength.