Concrete C20-C25, for hard-wearing RC structures

Concrete			Cement (t)		Aggregate (m³)	Water (m³)
Strength	D_max	Consistency	350 bspc 60	450 bspc 60	Aggregate (m³)	Water (m³)
C20	16	S2^x	-	0.253	1.15	0.15
	24	S2^x	-	0.242	1.14	0.14
	32	S2^x	-	0.232	1.13	0.13
C25	16	S1^xx	-	0.273	1.15	0.14
	24	S1^xx	-	0.263	1.14	0.13
	32	S1^xx	-	0.253	1.13	0.12

^x for hard-wearing RC structures
^xx for increased hard-wearing RC structures
bspc = blastfurnace slag portland cement