Prediction of Compressive Strength of Concrete in Wet-Dry Environment by BP Artificial Neural Networks

Table 3

Sample numbers of initial and final strength distribution intervals.

Strength intervals (MPa)	0∼25	25∼50	50∼75	75∼100	100∼125	125∼150	>150
Sample numbers of initial strength	43	621	361	40	7	0	6
Sample numbers of final strength	83	588	405	2	0	0	0