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http://dx.doi.org/10.12989/cac.2021.27.5.489

Prediction of compressive strength of concrete modified with fly ash: Applications of neuro-swarm and neuro-imperialism models  

Mohammed, Ahmed (College of Engineering, Civil Engineering Department, University of Sulaimani)
Kurda, Rawaz (Department of Highway Engineering Techniques, Technical Engineering College, Erbil Polytechnic University)
Armaghani, Danial Jahed (Department of Urban Planning, Engineering Networks and Systems, Institute of Architecture and Construction, South Ural State University)
Hasanipanah, Mahdi (Institute of Research and Development, Duy Tan University)
Publication Information
Computers and Concrete / v.27, no.5, 2021 , pp. 489-512 More about this Journal
Abstract
In this study, two powerful techniques, namely particle swarm optimization (PSO) and imperialist competitive algorithm (ICA) were selected and combined with a pre-developed ANN model aiming at improving its performance prediction of the compressive strength of concrete modified with fly ash. To achieve this study's aims, a comprehensive database with 379 data samples was collected from the available literature. The output of the database is the compressive strength (CS) of concrete samples, which are influenced by 9 parameters as model inputs, namely those related to mix composition. The modeling steps related to ICA-ANN (or neuro-imperialism) and PSO-ANN (or neuro-swarm) were conducted through the use of several parametric studies to design the most influential parameters on these hybrid models. A comparison of the CS values predicted by hybrid intelligence techniques with the experimental CS values confirmed that the neuro-swarm model could provide a higher degree of accuracy than another proposed hybrid model (i.e., neuro-imperialism). The train and test correlation coefficient values of (0.9042 and 0.9137) and (0.8383 and 0.8777) for neuro-swarm and neuro-imperialism models, respectively revealed that although both techniques are capable enough in prediction tasks, the developed neuro-swarm model can be considered as a better alternative technique in mapping the concrete strength behavior.
Keywords
artificial neural networks; fly ash; compressive strength; statistical analysis; intelligent computing;
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