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Influence of Na_(2)SiO_(3)/NaOH Ratio on Calcined Magnesium Silicate Based Geopolymer——Experimental and Predictive Study

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1077-1085页

作者： Premkumar R ramesh babu chokkalingam Meyyappan PL Shanmugasundaram M Kalasalingam Academy of Research and Education Krishnan KoilTamil Nadu626126 India Vellore Institute of Technology-Chennai Tamilnadu600127 India

This study aims to investigate the behavior of alkali activated mortar,which is made of naturally available magnesium silicate as source *** magnesium silicate,ultrafine natural steatite powder(UFNSP)is used as the primary source of binder,and the activation is initiated through the alkali liquid which is proportioned in various combinations of silicate to hydroxide ratio(Na_(2)SiO_(3)/Na OH)ratio,and this ratio in this study varies from 1 to *** UFNSP is calcined at two difierent temperatures,700 and 1000℃.The mortar mix is proportioned as 1:3 between powder and the fine aggregate,and the mortar is prepared with hydroxide molarity(M)of 10 *** mortar is cured for 48 hours at 60℃and the compressive strength was *** the mix were studied for its microstructural behavior along with compressive *** mix proportion of the mortar,and the results obtained through microstructural characterization were combinedly formed as input for artificial neural network(ANN)predictive *** model is designed to predict the compressive strength,which is trained through Bayesian regularization algorithm with varying hidden neurons of 7 to *** experimental and predictive study shows that the strength is influenced by both Na_(2)SiO_(3)/Na OH ratio and calcination *** the ANN is influenced by mainly calcination temperature and uncorrelation occurs in selected samples of 1000℃calcined UFNSP mix.

关键词： magnesium silicate silicate alkali activation geopolymer UFNSP prediction

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