A Computer-Aided Approach to Pozzolanic Concrete Mix Design

Table 9

Comparison of exact compressive strength with CSPNN-predicted compressive strength for the 20 testing samples.

No. of sample	Exact compressive strength () (MPa)	Predicted compressive strength () (MPa)	-(MPa)
1	57.67	54.93	2.74
2	67.06	58.74	8.32
3	54.90	51.92	2.98
4	41.67	41.12	0.54
5	57.45	58.72	−1.27
6	51.08	52.51	−1.43
7	60.70	62.97	−2.27
8	44.70	38.17	6.53
9	24.20	16.85	7.35
10	46.14	54.93	−8.79
11	44.62	40.39	4.23
12	40.80	44.19	−3.39
13	25.00	30.28	−5.28
14	57.00	59.32	−2.32
15	77.00	70.62	6.38
16	69.00	65.30	3.70
17	64.00	57.01	6.99
18	84.30	85.01	−0.71
19	78.10	75.91	2.19
20	59.00	59.52	−0.52