Utilization of Construction Waste Composite Powder Materials as Cementitious Materials in Small-Scale Prefabricated Concrete

Table 5

Reference mix ratios of the C20, C25, and C30.

Code	Water cement ratio	Sand ratio (%)	⁢Materials consumption of unit volume concrete (kg/m^3)
			⁢Cement	Aggregate	Sand	Water
C20	0.52	34	⁢228	1256	647	170
C25	0.49	33	⁢250	1252	616	175
C30	0.45	34	⁢272	1212	624	175