Table 10.

Validation of optimised model.

Variables		Response: compressive strength (MPa)		Error percentage (%)
A: BSA (%)	B: curing days (day)	Experimental	Predicted
0	7	20.76	19.90	4.1
1		21.19	21.70	2.4
2		21.51	27.00	25.5
0	14	23.86	23.30	2.4
1		21.97	25.10	14.3
2		24.00	30.50	27.1
0	28	31.61	32.30	2.2
1		28.77	34.10	18.5
2		29.50	39.40	33.6