An Alternative to Clay in Building Materials: Red Mud Sintering Using Fly Ash via Taguchi’s Methodology

An Alternative to Clay in Building Materials: Red Mud Sintering Using Fly Ash via Taguchi’s Methodology

“Red mud” or “bauxite residue” is a highly alkaline waste generated from alumina refinery with a pH of 10.5–12.5 which poses serious environmental problems. Neutralization or its treatment by sintering in presence of additives is one of the methods for overcoming the caustic problem as it fixes near...

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Main Authors: Suchita Rai, Dilip H. Lataye, M. J. Chaddha, R. S. Mishra, P. Mahendiran, J. Mukhopadhyay, ChangKyoo Yoo, Kailas L. Wasewar
Format: Article
Language:English
Published: Hindawi Limited 2013-01-01
Series:Advances in Materials Science and Engineering
Online Access:http://dx.doi.org/10.1155/2013/757923
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spelling doaj-c2999464ba90442a8b4c19ec5bac9ada2020-11-24T23:50:18ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84341687-84422013-01-01201310.1155/2013/757923757923An Alternative to Clay in Building Materials: Red Mud Sintering Using Fly Ash via Taguchi’s MethodologySuchita Rai0Dilip H. Lataye1M. J. Chaddha2R. S. Mishra3P. Mahendiran4J. Mukhopadhyay5ChangKyoo Yoo6Kailas L. Wasewar7Jawaharlal Nehru Aluminium Research Development and Design Centre, Wadi, Amravati Road, Nagpur, IndiaDepartment of Civil Engineering, Visvesvaraya National Institute of Technology (VNIT), Nagpur, Maharashtra 440011, IndiaJawaharlal Nehru Aluminium Research Development and Design Centre, Wadi, Amravati Road, Nagpur, IndiaJawaharlal Nehru Aluminium Research Development and Design Centre, Wadi, Amravati Road, Nagpur, IndiaJawaharlal Nehru Aluminium Research Development and Design Centre, Wadi, Amravati Road, Nagpur, IndiaIndian Institute of Technology, Gandhinagar, Gujarat, IndiaEnvironmental Management & Systems Engineering Lab (EMSEL), Department of Environmental Science and Engineering, College of Engineering, Kyung Hee University, Seocheon-dong 1, Giheung-gu, Gyeonggi-do, Yongin-si 446-701, Republic of KoreaAdvanced Separations and Analytical Laboratory, Department of Chemical Engineering, Visvesvaraya National Institute of Technology (VNIT), Nagpur, Maharashtra 440011, India“Red mud” or “bauxite residue” is a highly alkaline waste generated from alumina refinery with a pH of 10.5–12.5 which poses serious environmental problems. Neutralization or its treatment by sintering in presence of additives is one of the methods for overcoming the caustic problem as it fixes nearly all the leachable free caustic soda present in red mud. In the present study, feasibility of reducing the alkaline nature of red mud by sintering using fly ash as an additive via Taguchi methodology and its use for brick production, as an alternative to clay, is investigated. The analysis of variance (ANOVA) shows that sintering temperature is the most significant parameter in the process. A pH of 8.9 was obtained at 25–50% of red mud and 50–75% fly ash with water and temperature of . Alternatively 50% of red mud can be mixed with 50% of fly ash with water at temperature of to get a pH of about 8.4. The mechanism of this process has been explained with also emphasis on chemical, mineralogical, and morphological analysis of the sintered red mud. The results would be extremely useful in utilization of red mud in building and construction industry.http://dx.doi.org/10.1155/2013/757923
collection DOAJ
language English
format Article
sources DOAJ
author Suchita Rai
Dilip H. Lataye
M. J. Chaddha
R. S. Mishra
P. Mahendiran
J. Mukhopadhyay
ChangKyoo Yoo
Kailas L. Wasewar
spellingShingle Suchita Rai
Dilip H. Lataye
M. J. Chaddha
R. S. Mishra
P. Mahendiran
J. Mukhopadhyay
ChangKyoo Yoo
Kailas L. Wasewar
An Alternative to Clay in Building Materials: Red Mud Sintering Using Fly Ash via Taguchi’s Methodology
Advances in Materials Science and Engineering
author_facet Suchita Rai
Dilip H. Lataye
M. J. Chaddha
R. S. Mishra
P. Mahendiran
J. Mukhopadhyay
ChangKyoo Yoo
Kailas L. Wasewar
author_sort Suchita Rai
title An Alternative to Clay in Building Materials: Red Mud Sintering Using Fly Ash via Taguchi’s Methodology
title_short An Alternative to Clay in Building Materials: Red Mud Sintering Using Fly Ash via Taguchi’s Methodology
title_full An Alternative to Clay in Building Materials: Red Mud Sintering Using Fly Ash via Taguchi’s Methodology
title_fullStr An Alternative to Clay in Building Materials: Red Mud Sintering Using Fly Ash via Taguchi’s Methodology
title_full_unstemmed An Alternative to Clay in Building Materials: Red Mud Sintering Using Fly Ash via Taguchi’s Methodology
title_sort alternative to clay in building materials: red mud sintering using fly ash via taguchi’s methodology
publisher Hindawi Limited
series Advances in Materials Science and Engineering
issn 1687-8434
1687-8442
publishDate 2013-01-01
description “Red mud” or “bauxite residue” is a highly alkaline waste generated from alumina refinery with a pH of 10.5–12.5 which poses serious environmental problems. Neutralization or its treatment by sintering in presence of additives is one of the methods for overcoming the caustic problem as it fixes nearly all the leachable free caustic soda present in red mud. In the present study, feasibility of reducing the alkaline nature of red mud by sintering using fly ash as an additive via Taguchi methodology and its use for brick production, as an alternative to clay, is investigated. The analysis of variance (ANOVA) shows that sintering temperature is the most significant parameter in the process. A pH of 8.9 was obtained at 25–50% of red mud and 50–75% fly ash with water and temperature of . Alternatively 50% of red mud can be mixed with 50% of fly ash with water at temperature of to get a pH of about 8.4. The mechanism of this process has been explained with also emphasis on chemical, mineralogical, and morphological analysis of the sintered red mud. The results would be extremely useful in utilization of red mud in building and construction industry.
url http://dx.doi.org/10.1155/2013/757923
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