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Novel Analytical Method for Mix Design and Performance Prediction of High Calcium Fly Ash Geopolymer Concrete

Despite extensive in-depth research into high calcium fly ash geopolymer concretes and a number of proposed methods to calculate the mix proportions, no universally applicable method to determine the mix proportions has been developed. This paper uses an artificial neural network (ANN) machine learn...

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Detalles Bibliográficos
Autores principales: Gunasekara, Chamila, Atzarakis, Peter, Lokuge, Weena, Law, David W., Setunge, Sujeeva
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7998317/
https://www.ncbi.nlm.nih.gov/pubmed/33804194
http://dx.doi.org/10.3390/polym13060900
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author Gunasekara, Chamila
Atzarakis, Peter
Lokuge, Weena
Law, David W.
Setunge, Sujeeva
author_facet Gunasekara, Chamila
Atzarakis, Peter
Lokuge, Weena
Law, David W.
Setunge, Sujeeva
author_sort Gunasekara, Chamila
collection PubMed
description Despite extensive in-depth research into high calcium fly ash geopolymer concretes and a number of proposed methods to calculate the mix proportions, no universally applicable method to determine the mix proportions has been developed. This paper uses an artificial neural network (ANN) machine learning toolbox in a MATLAB programming environment together with a Bayesian regularization algorithm, the Levenberg-Marquardt algorithm and a scaled conjugate gradient algorithm to attain a specified target compressive strength at 28 days. The relationship between the four key parameters, namely water/solid ratio, alkaline activator/binder ratio, Na(2)SiO(3)/NaOH ratio and NaOH molarity, and the compressive strength of geopolymer concrete is determined. The geopolymer concrete mix proportions based on the ANN algorithm model and contour plots developed were experimentally validated. Thus, the proposed method can be used to determine mix designs for high calcium fly ash geopolymer concrete in the range 25–45 MPa at 28 days. In addition, the design equations developed using the statistical regression model provide an insight to predict tensile strength and elastic modulus for a given compressive strength.
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spelling pubmed-79983172021-03-28 Novel Analytical Method for Mix Design and Performance Prediction of High Calcium Fly Ash Geopolymer Concrete Gunasekara, Chamila Atzarakis, Peter Lokuge, Weena Law, David W. Setunge, Sujeeva Polymers (Basel) Article Despite extensive in-depth research into high calcium fly ash geopolymer concretes and a number of proposed methods to calculate the mix proportions, no universally applicable method to determine the mix proportions has been developed. This paper uses an artificial neural network (ANN) machine learning toolbox in a MATLAB programming environment together with a Bayesian regularization algorithm, the Levenberg-Marquardt algorithm and a scaled conjugate gradient algorithm to attain a specified target compressive strength at 28 days. The relationship between the four key parameters, namely water/solid ratio, alkaline activator/binder ratio, Na(2)SiO(3)/NaOH ratio and NaOH molarity, and the compressive strength of geopolymer concrete is determined. The geopolymer concrete mix proportions based on the ANN algorithm model and contour plots developed were experimentally validated. Thus, the proposed method can be used to determine mix designs for high calcium fly ash geopolymer concrete in the range 25–45 MPa at 28 days. In addition, the design equations developed using the statistical regression model provide an insight to predict tensile strength and elastic modulus for a given compressive strength. MDPI 2021-03-15 /pmc/articles/PMC7998317/ /pubmed/33804194 http://dx.doi.org/10.3390/polym13060900 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Gunasekara, Chamila
Atzarakis, Peter
Lokuge, Weena
Law, David W.
Setunge, Sujeeva
Novel Analytical Method for Mix Design and Performance Prediction of High Calcium Fly Ash Geopolymer Concrete
title Novel Analytical Method for Mix Design and Performance Prediction of High Calcium Fly Ash Geopolymer Concrete
title_full Novel Analytical Method for Mix Design and Performance Prediction of High Calcium Fly Ash Geopolymer Concrete
title_fullStr Novel Analytical Method for Mix Design and Performance Prediction of High Calcium Fly Ash Geopolymer Concrete
title_full_unstemmed Novel Analytical Method for Mix Design and Performance Prediction of High Calcium Fly Ash Geopolymer Concrete
title_short Novel Analytical Method for Mix Design and Performance Prediction of High Calcium Fly Ash Geopolymer Concrete
title_sort novel analytical method for mix design and performance prediction of high calcium fly ash geopolymer concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7998317/
https://www.ncbi.nlm.nih.gov/pubmed/33804194
http://dx.doi.org/10.3390/polym13060900
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