Prediction of the Compressive Strength of Concrete Admixed with Metakaolin Using Gene Expression Programming

Table 7

Compressive strength of metakaolin concrete for grade M20.

Water/binder ratio	Metakaolin (%)	28-day compressive strength (N/mm^2)
0.4	0	23.4
	5	24.2
	10	25.66
	15	19
	20	14.5
0.5	0	22.22
	5	23.65
	10	25
	15	18.5
	20	16.3
0.6	0	23.43
	5	24
	10	25.53
	15	18.41
	20	16