Test number	Design strength level	Cementitious material (kg/m³)	Fine aggregate (kg/m³)		Machine-made sand substitution rate (%)	Coarse aggregate (kg/m³)	Water (kg/m³)	Water reducing agent dosage (%)
Test number	Design strength level	Cementitious material (kg/m³)	Natural sand	Machine-made sand	Machine-made sand substitution rate (%)	Coarse aggregate (kg/m³)	Water (kg/m³)	Water reducing agent dosage (%)
20	C25	305	775	0	0	1120	165	1.75
21	C20	275	556.5	238.5	30	1120	170	1.95
22	C20	275	397.5	397.5	50	1120	170	2.2
23	C25	305	542.5	232.5	30	1120	165	2.0
24	C25	305	387.5	387.5	50	1120	165	2.0
25	C30	335	528.5	226.5	30	1120	160	2.1
26	C30	335	377.5	377.5	50	1120	160	2.4