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Workability, compressive strength & leachability of coal ash concrete

One of the essential steps for planning solid waste management towards sustainable development is to reuse solid waste in the construction industry. Coal is one of the world's most important sources of energy, fueling almost 40 % of electricity worldwide. Malaysia is commonly producing electric...

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Main Authors: Rafieizonooz, M., Salim, M. R., Hussin, M. W., Mirza, J., Yunus, S. M., Khankhaje, E.
Format: Article
Published: Italian Association of Chemical Engineering - AIDIC 2017
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.utm.my/id/eprint/75599/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019469659&doi=10.3303%2fCET1756074&partnerID=40&md5=2cdc7bf75e0f00068e695e5e94a77ceb
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spelling my.utm.755992018-04-27T01:33:15Z http://eprints.utm.my/id/eprint/75599/ Workability, compressive strength & leachability of coal ash concrete Rafieizonooz, M. Salim, M. R. Hussin, M. W. Mirza, J. Yunus, S. M. Khankhaje, E. TA Engineering (General). Civil engineering (General) One of the essential steps for planning solid waste management towards sustainable development is to reuse solid waste in the construction industry. Coal is one of the world's most important sources of energy, fueling almost 40 % of electricity worldwide. Malaysia is commonly producing electricity through burning millions of tonnes of coal. This process generates around 8.5 Mt of coal ash, which comprised of 80 % Fly Ash (FA), and 20 % Bottom Ash (BA) as waste. The study aims to investigate the workability, compressive strength and leachability of concrete containing BA and FA as replacement of sand and cement. Cement was substituted with 20 % of FA by mass and fine aggregate was replaced with BA at 0, 20, 50, 75 and 100 % in the concrete mix. The results show that the percentage sum of SiO2, Al2O3 and Fe2O3 (the main chemical composition in coal ash) in FA and BA are about 78.82 % and 83.24 %. The leaching test showed that the heavy metal concentrations in leachates are much lower than recommended in the USEPA SW 846. Workability of concrete was reduced by increasing BA content as a sand replacement in the concrete mixture. After 91 d and 180 d curing periods, the compressive strength of both the experimental and control samples of concrete were roughly comparable. It can be concluded that BA and FA can be used as a replacement of sand and cement in normal concrete without any environmental problem. Italian Association of Chemical Engineering - AIDIC 2017 Article PeerReviewed Rafieizonooz, M. and Salim, M. R. and Hussin, M. W. and Mirza, J. and Yunus, S. M. and Khankhaje, E. (2017) Workability, compressive strength & leachability of coal ash concrete. Chemical Engineering Transactions, 56 . pp. 439-444. ISSN 2283-9216 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019469659&doi=10.3303%2fCET1756074&partnerID=40&md5=2cdc7bf75e0f00068e695e5e94a77ceb
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.
Hussin, M. W.
Mirza, J.
Yunus, S. M.
Khankhaje, E.
Workability, compressive strength & leachability of coal ash concrete
description One of the essential steps for planning solid waste management towards sustainable development is to reuse solid waste in the construction industry. Coal is one of the world's most important sources of energy, fueling almost 40 % of electricity worldwide. Malaysia is commonly producing electricity through burning millions of tonnes of coal. This process generates around 8.5 Mt of coal ash, which comprised of 80 % Fly Ash (FA), and 20 % Bottom Ash (BA) as waste. The study aims to investigate the workability, compressive strength and leachability of concrete containing BA and FA as replacement of sand and cement. Cement was substituted with 20 % of FA by mass and fine aggregate was replaced with BA at 0, 20, 50, 75 and 100 % in the concrete mix. The results show that the percentage sum of SiO2, Al2O3 and Fe2O3 (the main chemical composition in coal ash) in FA and BA are about 78.82 % and 83.24 %. The leaching test showed that the heavy metal concentrations in leachates are much lower than recommended in the USEPA SW 846. Workability of concrete was reduced by increasing BA content as a sand replacement in the concrete mixture. After 91 d and 180 d curing periods, the compressive strength of both the experimental and control samples of concrete were roughly comparable. It can be concluded that BA and FA can be used as a replacement of sand and cement in normal concrete without any environmental problem.
format Article
author Rafieizonooz, M.
Salim, M. R.
Hussin, M. W.
Mirza, J.
Yunus, S. M.
Khankhaje, E.
author_facet Rafieizonooz, M.
Salim, M. R.
Hussin, M. W.
Mirza, J.
Yunus, S. M.
Khankhaje, E.
author_sort Rafieizonooz, M.
title Workability, compressive strength & leachability of coal ash concrete
title_short Workability, compressive strength & leachability of coal ash concrete
title_full Workability, compressive strength & leachability of coal ash concrete
title_fullStr Workability, compressive strength & leachability of coal ash concrete
title_full_unstemmed Workability, compressive strength & leachability of coal ash concrete
title_sort workability, compressive strength & leachability of coal ash concrete
publisher Italian Association of Chemical Engineering - AIDIC
publishDate 2017
url http://eprints.utm.my/id/eprint/75599/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019469659&doi=10.3303%2fCET1756074&partnerID=40&md5=2cdc7bf75e0f00068e695e5e94a77ceb
_version_ 1643657107325583360
score 13.211869

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