The basic mechanical properties of concrete are generally obtained from the standard concrete specimen after curing of 28 days. The lightweight concrete is produced from these aggregates, and the properties were studied under laboratory experiments. The fly ash is processed with admixtures subjected to heat treatment and finally sintered to form sintered fly ash lightweight aggregates. The aggregates were produced by sintering process of fly ash that is obtained from thermal power plants. In this study, the use of artificially made lightweight aggregate is used for forming the concrete. The difference in experimental results reveals the variability in the production of LWA and variation of parameters simultaneously during experiments. The cause may be due to the type of admixture added for making the lightweight aggregate and the type of experimental approach. But still, there is a research gap in understanding the properties and behaviour of lightweight aggregate concrete. The behaviour, quality and properties of lightweight structural concrete incorporating such aggregates are already under research ( Nadesan & Dinakar, 2017). In this century, many efforts have been intensified for making artificial and sustainable lightweight aggregates manufactured with varying proportions of industrial by-products. It is the crucial factor that is the reason for growing research in structural lightweight aggregate concrete. With advancements in technology and growing needs for the development of high-performance concrete, these lightweight aggregate concretes are modified to fit the strength and durability requirements. Since from the 1990s, the structural lightweight aggregate concrete has been viewed differently. Lightweight concretes can either be made of a lightweight aggregate or a foamed concrete or autoclaved aerated concrete. Compared to normal-weight concrete, the lightweight concrete reduces the self-weight of the structure, increases the floor area, reduces the overall dimensions ( Dawood & Raml, 2008), and shows better strength and thermal insulation. The lightweight concrete has been a promising modern construction technology. The lightweight concrete is always noticed for reduced construction cost and improved functional requirements or a combination of both. The Lightweight Concrete (LWC) was pronounced to be used in the last 2000 years. Keywords: Sintered Fly ash aggregate ANN algorithm variables regression The models were compared with the experimental data’s, and the results were discussed. The developed models had more accuracy with minimum error and had a higher correlation with the correlation coefficients of 0.916 and 0.955 were obtained for the training and testing data of compressive strength prediction, 0.949 and 0.937 respectively for split tensile strength prediction, 0.926 and 0.928 respectively for prediction of flexural strength. Amongst the total data, approximately 70% of the data was considered for training, 15% for testing and the remaining 15% has been considered for validation. Feed forward neural network and Levenberg-Marquardt back propagation algorithm were used for training algorithm in ANN. The variables considered in the study are the quantity of cement and water-cement ratio. The models were formulated based on results obtained from laboratory experiments. An empirical relationship between the compressive strength, split tensile strength, and flexural strength was developed and compared with that of experimental results. In this study, Artificial Neural Network (ANN) model is constructed to predict the compressive strength, split tensile strength and flexural strength of lightweight aggregate concrete made of sintered fly ash aggregate.
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