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Toxicity characteristics and durability of concrete containing coal ash as substitute for cement and river sand

The main aim of this study was to investigate the toxicity characteristics and durability of concrete containing bottom ash (BA) and fly ash (FA), as partial or total replacement of fine aggregate and Ordinary Portland cement (OPC), respectively. Concrete mixtures were prepared containing 0, 20, 50,...

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Main Authors:	Rafieizonooz, M., Salim, M. R., Mirza, J., Hussin, M. W., Salmiati, Salmiati, Khan, R., Khankhaje, E.
Format:	Article
Published:	Elsevier Ltd 2017
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/75967/ https://dx.doi.org/10.1016/j.conbuildmat.2017.03.151
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id	my.utm.75967
record_format	eprints
spelling	my.utm.759672019-02-13T04:16:06Z http://eprints.utm.my/id/eprint/75967/ Toxicity characteristics and durability of concrete containing coal ash as substitute for cement and river sand Rafieizonooz, M. Salim, M. R. Mirza, J. Hussin, M. W. Salmiati, Salmiati Khan, R. Khankhaje, E. TA Engineering (General). Civil engineering (General) The main aim of this study was to investigate the toxicity characteristics and durability of concrete containing bottom ash (BA) and fly ash (FA), as partial or total replacement of fine aggregate and Ordinary Portland cement (OPC), respectively. Concrete mixtures were prepared containing 0, 20, 50, 75 and 100% of BA as a substitute for river sand and 20% of FA as a replacement for OPC. Tests carried out were Toxicity Characteristics Leaching Procedure (TCLP), sulfate and acid attack (change in compressive strength, microstructure and weight) and elevated temperature effects (loss in compressive strength and mass as well as change in pulse velocity). Results showed that submerging coal ash concrete (CAC) mixtures in 5% sulfuric acid solution resulted in less reduction of compressive strength and mass loss compare to that of the control concrete. Moreover, sulfate resistance tests on concrete mixtures indicated that there were no mass loss and no reduction in compressive strength of all the mixtures after submersion in 5% magnesium sulfate solution. CAC showed higher weight loss and greater compressive strength reduction at elevated temperatures. From TCLP results, it is concluded that none of the elements leached higher than the maximum concentration of contaminants for toxicity characteristics. It indicates that transportation, disposal and utilization of BA and FA as clean construction material's replacement could be utilized to reduce their environmental problems, increase efficiency and reduced unit cost production of concrete. Elsevier Ltd 2017 Article PeerReviewed Rafieizonooz, M. and Salim, M. R. and Mirza, J. and Hussin, M. W. and Salmiati, Salmiati and Khan, R. and Khankhaje, E. (2017) Toxicity characteristics and durability of concrete containing coal ash as substitute for cement and river sand. Construction and Building Materials, 143 . pp. 234-246. ISSN 0950-0618 https://dx.doi.org/10.1016/j.conbuildmat.2017.03.151 DOI:10.1016/j.conbuildmat.2017.03.151
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Rafieizonooz, M. Salim, M. R. Mirza, J. Hussin, M. W. Salmiati, Salmiati Khan, R. Khankhaje, E. Toxicity characteristics and durability of concrete containing coal ash as substitute for cement and river sand
description	The main aim of this study was to investigate the toxicity characteristics and durability of concrete containing bottom ash (BA) and fly ash (FA), as partial or total replacement of fine aggregate and Ordinary Portland cement (OPC), respectively. Concrete mixtures were prepared containing 0, 20, 50, 75 and 100% of BA as a substitute for river sand and 20% of FA as a replacement for OPC. Tests carried out were Toxicity Characteristics Leaching Procedure (TCLP), sulfate and acid attack (change in compressive strength, microstructure and weight) and elevated temperature effects (loss in compressive strength and mass as well as change in pulse velocity). Results showed that submerging coal ash concrete (CAC) mixtures in 5% sulfuric acid solution resulted in less reduction of compressive strength and mass loss compare to that of the control concrete. Moreover, sulfate resistance tests on concrete mixtures indicated that there were no mass loss and no reduction in compressive strength of all the mixtures after submersion in 5% magnesium sulfate solution. CAC showed higher weight loss and greater compressive strength reduction at elevated temperatures. From TCLP results, it is concluded that none of the elements leached higher than the maximum concentration of contaminants for toxicity characteristics. It indicates that transportation, disposal and utilization of BA and FA as clean construction material's replacement could be utilized to reduce their environmental problems, increase efficiency and reduced unit cost production of concrete.
format	Article
author	Rafieizonooz, M. Salim, M. R. Mirza, J. Hussin, M. W. Salmiati, Salmiati Khan, R. Khankhaje, E.
author_facet	Rafieizonooz, M. Salim, M. R. Mirza, J. Hussin, M. W. Salmiati, Salmiati Khan, R. Khankhaje, E.
author_sort	Rafieizonooz, M.
title	Toxicity characteristics and durability of concrete containing coal ash as substitute for cement and river sand
title_short	Toxicity characteristics and durability of concrete containing coal ash as substitute for cement and river sand
title_full	Toxicity characteristics and durability of concrete containing coal ash as substitute for cement and river sand
title_fullStr	Toxicity characteristics and durability of concrete containing coal ash as substitute for cement and river sand
title_full_unstemmed	Toxicity characteristics and durability of concrete containing coal ash as substitute for cement and river sand
title_sort	toxicity characteristics and durability of concrete containing coal ash as substitute for cement and river sand
publisher	Elsevier Ltd
publishDate	2017
url	http://eprints.utm.my/id/eprint/75967/ https://dx.doi.org/10.1016/j.conbuildmat.2017.03.151
_version_	1643657209518751744
score	13.211869

Toxicity characteristics and durability of concrete containing coal ash as substitute for cement and river sand

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