Figure 2.

Illustration of results obtained using artificial neural networks (ANN) for density of lightweight concrete (LWC) as a function of GEGA 2 mm and GEGA 4 mm shares in the specimen, (a) results generated by ANN for individual testing datasets (b) relative error of ANN for individual testing datasets (c) comparison of measurement results with values obtained by ANN for training database (d) values of density of LWC predicted by ANN for intermediate points between measurement data from the training dataset.