Applicability of Artificial Neural Networks to Predict Mechanical and Permeability Properties of Volcanic Scoria-Based Concrete

Table 2

Correlation coefficients (R) of artificial neural network models.

ANN model	Correlation coefficient (R)
	Training	Testing	Validating	Overall data
ANN1 (compressive strength)	0.99976	0.99937	0.99953	0.99968
ANN2 (water permeability)	0.99927	0.99732	0.99864	0.99891
ANN3 (porosity)	0.99972	0.99951	0.99873	0.99954