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2021 | OriginalPaper | Chapter

A Mathematical Correlation of Compressive Strength Among Silica, Alumina and Calcia Present in Composite Red Mud and Iron Ore Tailingbricks

Authors : M. Beulah, Pranab Das, G. Gayathri, M. R. Sudhir, K. Sarath Chandra, P. Sasha Rai

Published in: Advances in Geotechnics and Structural Engineering

Publisher: Springer Singapore

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Abstract

Waste Red Mud generated from bauxite beneficiation in aluminium industry contains sodium oxide in minor amount along with silica and alumina in significant quantities. Waste iron ore tailings from beneficiation of iron ore in steel industry contain silica and alumina in significant quantities. A combination of both these materials in different amounts along with GGBS and lime addition resulted in complex alkali-activated reaction products consisting of (Si/Al), (Ca/Si) and (Ca/(Si+Al)) complexes which influence compressive strength of the test samples on curing for extended time periods at room temperature. Individual correlation coefficients of these complexes with compressive strength yielded high values with (Si/Al) and (Ca/Si+Al) ratios (0.92 and 0.96, respectively) while showing a poor correlation coefficient with (Ca/Si) ratio (0.88). A direct regression analysis between compressive strength and (Si/Al) ratio and (Ca/Si+Al) ratio indicated negative values with (Si/Al) ratios but positive values with (Ca/ (Si+Al)) ratios. It is therefore concluded that the addition of lime and GGBS (contributed from both GGBS and lime addition) resulted in Ca-Si-Al complex formations which are responsible for improved compressive strength of the samples.

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Title: A Mathematical Correlation of Compressive Strength Among Silica, Alumina and Calcia Present in Composite Red Mud and Iron Ore Tailingbricks
Authors: M. Beulah
Pranab Das
G. Gayathri
M. R. Sudhir
K. Sarath Chandra
P. Sasha Rai
Publisher: Springer Singapore
Book: Advances in Geotechnics and Structural Engineering
Print ISBN: 978-981-336-968-9

Electronic ISBN: 978-981-336-969-6

Copyright Year: 2021
DOI: https://doi.org/10.1007/978-981-33-6969-6_29

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