Compressive strength, flexural strength and thermal conductivity of autoclaved concrete block made using bottom ash as cement replacement materials

The bottom ash (BA) from Mae Moh power plant, Lampang, Thailand was used as Portland cement replacement to produce lightweight concrete (LWC) by autoclave aerated concrete method. Portland cement type 1, river sand, bottom ash, aluminium powder and calcium hydroxide (Ca(OH)2) were used in this study...

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Main Authors: Wongkeo W., Thongsanitgarn P., Pimraksa K., Chaipanich A.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-80155194891&partnerID=40&md5=919bb09f9133ec111d95a6d02f3e6e41
http://cmuir.cmu.ac.th/handle/6653943832/6014
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Institution: Chiang Mai University
Language: English
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spelling th-cmuir.6653943832-60142014-08-30T03:23:44Z Compressive strength, flexural strength and thermal conductivity of autoclaved concrete block made using bottom ash as cement replacement materials Wongkeo W. Thongsanitgarn P. Pimraksa K. Chaipanich A. The bottom ash (BA) from Mae Moh power plant, Lampang, Thailand was used as Portland cement replacement to produce lightweight concrete (LWC) by autoclave aerated concrete method. Portland cement type 1, river sand, bottom ash, aluminium powder and calcium hydroxide (Ca(OH)2) were used in this study. BA was used to replace Portland cement at 0%, 10%, 20% and 30% by weight and aluminium powder was added at 0.2% by weight in order to produce the aerated concrete. Compressive strength, flexural and thermal conductivity tests were then carried out after the concrete were autoclaved for 6h and left in air for 7days. The results show that the compressive strength, flexural strength and thermal conductivity increased with increased BA content due to tobermorite formation. However, approximately, 20% increase in both compressive (up to 11.61MPa) and flexural strengths (up to 3.16MPa) was found for mixes with 30% BA content in comparison to just around 6% increase in the thermal conductivity. Thermogravimetry analysis shows C-S-H formation and X-ray diffraction confirm tobermorite formation in bottom ash lightweight concrete. The use of BA as a cement replacement, therefore, can be seen to have the benefit in enhancing strength of the aerated concrete while achieving comparatively low thermal conductivity when compared to the results of the control Portland cement concrete. © 2011 Elsevier Ltd. 2014-08-30T03:23:44Z 2014-08-30T03:23:44Z Article in Press 2613069 10.1016/j.matdes.2011.08.046 http://www.scopus.com/inward/record.url?eid=2-s2.0-80155194891&partnerID=40&md5=919bb09f9133ec111d95a6d02f3e6e41 http://cmuir.cmu.ac.th/handle/6653943832/6014 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description The bottom ash (BA) from Mae Moh power plant, Lampang, Thailand was used as Portland cement replacement to produce lightweight concrete (LWC) by autoclave aerated concrete method. Portland cement type 1, river sand, bottom ash, aluminium powder and calcium hydroxide (Ca(OH)2) were used in this study. BA was used to replace Portland cement at 0%, 10%, 20% and 30% by weight and aluminium powder was added at 0.2% by weight in order to produce the aerated concrete. Compressive strength, flexural and thermal conductivity tests were then carried out after the concrete were autoclaved for 6h and left in air for 7days. The results show that the compressive strength, flexural strength and thermal conductivity increased with increased BA content due to tobermorite formation. However, approximately, 20% increase in both compressive (up to 11.61MPa) and flexural strengths (up to 3.16MPa) was found for mixes with 30% BA content in comparison to just around 6% increase in the thermal conductivity. Thermogravimetry analysis shows C-S-H formation and X-ray diffraction confirm tobermorite formation in bottom ash lightweight concrete. The use of BA as a cement replacement, therefore, can be seen to have the benefit in enhancing strength of the aerated concrete while achieving comparatively low thermal conductivity when compared to the results of the control Portland cement concrete. © 2011 Elsevier Ltd.
format Article
author Wongkeo W.
Thongsanitgarn P.
Pimraksa K.
Chaipanich A.
spellingShingle Wongkeo W.
Thongsanitgarn P.
Pimraksa K.
Chaipanich A.
Compressive strength, flexural strength and thermal conductivity of autoclaved concrete block made using bottom ash as cement replacement materials
author_facet Wongkeo W.
Thongsanitgarn P.
Pimraksa K.
Chaipanich A.
author_sort Wongkeo W.
title Compressive strength, flexural strength and thermal conductivity of autoclaved concrete block made using bottom ash as cement replacement materials
title_short Compressive strength, flexural strength and thermal conductivity of autoclaved concrete block made using bottom ash as cement replacement materials
title_full Compressive strength, flexural strength and thermal conductivity of autoclaved concrete block made using bottom ash as cement replacement materials
title_fullStr Compressive strength, flexural strength and thermal conductivity of autoclaved concrete block made using bottom ash as cement replacement materials
title_full_unstemmed Compressive strength, flexural strength and thermal conductivity of autoclaved concrete block made using bottom ash as cement replacement materials
title_sort compressive strength, flexural strength and thermal conductivity of autoclaved concrete block made using bottom ash as cement replacement materials
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-80155194891&partnerID=40&md5=919bb09f9133ec111d95a6d02f3e6e41
http://cmuir.cmu.ac.th/handle/6653943832/6014
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