Electrical tests to analyse the transport properties of concrete – II: using a neural network model to derive diffusion coefficients


In this chapter, the computer model of electromigration which was introduced in Chapter 10 is combined with an artificial neural network (ANN) model to enable values for diffusion coefficients to be determined from test results from the modified ASTM C1202 rapid chloride test. The ANN is necessary because the model in Chapter 10 requires values for the diffusion coefficients and capacity factors of the mobile ions and uses these to predict the test results for current and membrane potential. By using the ANN, it is possible to use the test results to calculate the diffusion coefficients and capacity factors ...

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