Fig. 7 shows the increase in water demand for the different fine aggregate types with the increase in aggregate proportions recorded at 0.6 w/c ratio. This trend is found to be true for all the w/c ratio tested.
Fig. 7 also shows that the river sand requires higher water content for all the aggregate proportions.
Fig. 8 shows the water demands for different w/c ratios recorded for 60%fine aggregate proportion to total aggregate content. With the increase in w/c ratio cement content and therefore the admixture dosage in the mix is expected to be dropped. As earlier mentioned, fluidity in SCC is effected by both water content & admixture dosage. Therefore this higher water demand for the higher w/c ratio is attributable to regain
the effect of admixture dosage.