A network of the feedforward-type artificial neural networks (ANNs) was used to predict the compressive strength of concrete\r\nmade from crude oil contaminated soil samples at 3, 7, 14, 28, 56, 84, and 168 days at different degrees of contamination of 2.5%,\r\n5%, 10%, 15%, 20% and 25%. A total of 49 samples were used in the training, testing, and prediction phase of the modeling in the\r\nratio 32 : 11 : 7. The TANH activation function was used and the maximum number of iterations was limited to 20,000 the model\r\nused a momentum of 0.6 and a learning rate of 0.031056. Twenty (20) different architectures were considered and the most suitable\r\none was the 2-2-1. Statistical analysis of the output of the network was carried out and the correlation coefficient of the training\r\nand testing data is 0.9955712 and 0.980097. The result of the network has shown that the use of neural networks is effective in the\r\nprediction of the compressive strength of concrete made from crude oil impacted sand.
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