Mechanical properties of ceramic tiles by replacement of quartz by RHA and POFA

Rice husk ash (RHA) and palm oil fuel ash (POFA) have a great potential to replace the quartz element in porcelain composition. RHA and POFA were mostly used by construction industries, and only a few researchers studied its applications in ceramics industries. It is due to the mechanical properties...

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Main Author:	Jamo, Hassan Usman
Format:	Thesis
Language:	English English English
Published:	2015
Subjects:	TA401-492 Materials of engineering and construction Mechanics of materials
Online Access:	http://eprints.uthm.edu.my/1514/2/HASSAN%20USMAN%20JAMO%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1514/1/24p%20HASSAN%20USMAN%20JAMO.pdf http://eprints.uthm.edu.my/1514/3/HASSAN%20USMAN%20JAMO%20WATERMARK.pdf
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spelling	my-uthm-ep.15142021-10-03T07:48:12Z Mechanical properties of ceramic tiles by replacement of quartz by RHA and POFA 2015-06 Jamo, Hassan Usman TA401-492 Materials of engineering and construction. Mechanics of materials Rice husk ash (RHA) and palm oil fuel ash (POFA) have a great potential to replace the quartz element in porcelain composition. RHA and POFA were mostly used by construction industries, and only a few researchers studied its applications in ceramics industries. It is due to the mechanical properties of porcelain are strongly affected by the generated thermal stress during processing because of the deleterious effects of quartz. In this work, the quartz is being replaced by RHA, POFA and the combination of RHA and POFA. The sample's composition was mixed for 90 minutes and pressed at different mold pressures (31, 61, 91 and 121 MPa) and then sintered at the sintering temperatures ranging from 1000 to 1300 οC at different soaking times ranging from 1 to 3 hours respectively. The samples were measured the physical and mechanical properties and then the microstructure observation. It was found that the RHA, POFA and the combination of RHA and POFA have tremendous effects on the properties of porcelain tiles. For the RHA, the highest bulk density (2.42 g/cm3) and compressive strength (44 MPa) were recorded on 20 wt% of RHA at the sintering temperature of 1200 οC and the soaking time of 2 hours. For the POFA, the highest bulk density (2.45 g/cm3) and compressive strength (46 MPa) were achieved on 15 wt% of POFA at the sintering temperature of 1100 οC and the soaking time of 2 hours. For the combination of RHA and POFA, the highest bulk density (2.43 g/cm3) and compressive strength (45 MPa) were recorded on 20 wt% of RHA and POFA at the sintering temperature of 1200 οC and the soaking time of 2 hours. It was observed that the microstructure was enhanced by increasing the sintering temperature, mould pressure and soaking time. It can be concluded that samples containing POFA attained vitrification stage at lower temperature and exhibited higher mechanical properties. Thermal expansion and thermal conductivity measurement are some of the areas that could be explored for further research. 2015-06 Thesis http://eprints.uthm.edu.my/1514/ http://eprints.uthm.edu.my/1514/2/HASSAN%20USMAN%20JAMO%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/1514/1/24p%20HASSAN%20USMAN%20JAMO.pdf text en public http://eprints.uthm.edu.my/1514/3/HASSAN%20USMAN%20JAMO%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Faculty of Science, Technology and Human Development
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TA401-492 Materials of engineering and construction Mechanics of materials
spellingShingle	TA401-492 Materials of engineering and construction Mechanics of materials Jamo, Hassan Usman Mechanical properties of ceramic tiles by replacement of quartz by RHA and POFA
description	Rice husk ash (RHA) and palm oil fuel ash (POFA) have a great potential to replace the quartz element in porcelain composition. RHA and POFA were mostly used by construction industries, and only a few researchers studied its applications in ceramics industries. It is due to the mechanical properties of porcelain are strongly affected by the generated thermal stress during processing because of the deleterious effects of quartz. In this work, the quartz is being replaced by RHA, POFA and the combination of RHA and POFA. The sample's composition was mixed for 90 minutes and pressed at different mold pressures (31, 61, 91 and 121 MPa) and then sintered at the sintering temperatures ranging from 1000 to 1300 οC at different soaking times ranging from 1 to 3 hours respectively. The samples were measured the physical and mechanical properties and then the microstructure observation. It was found that the RHA, POFA and the combination of RHA and POFA have tremendous effects on the properties of porcelain tiles. For the RHA, the highest bulk density (2.42 g/cm3) and compressive strength (44 MPa) were recorded on 20 wt% of RHA at the sintering temperature of 1200 οC and the soaking time of 2 hours. For the POFA, the highest bulk density (2.45 g/cm3) and compressive strength (46 MPa) were achieved on 15 wt% of POFA at the sintering temperature of 1100 οC and the soaking time of 2 hours. For the combination of RHA and POFA, the highest bulk density (2.43 g/cm3) and compressive strength (45 MPa) were recorded on 20 wt% of RHA and POFA at the sintering temperature of 1200 οC and the soaking time of 2 hours. It was observed that the microstructure was enhanced by increasing the sintering temperature, mould pressure and soaking time. It can be concluded that samples containing POFA attained vitrification stage at lower temperature and exhibited higher mechanical properties. Thermal expansion and thermal conductivity measurement are some of the areas that could be explored for further research.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Jamo, Hassan Usman
author_facet	Jamo, Hassan Usman
author_sort	Jamo, Hassan Usman
title	Mechanical properties of ceramic tiles by replacement of quartz by RHA and POFA
title_short	Mechanical properties of ceramic tiles by replacement of quartz by RHA and POFA
title_full	Mechanical properties of ceramic tiles by replacement of quartz by RHA and POFA
title_fullStr	Mechanical properties of ceramic tiles by replacement of quartz by RHA and POFA
title_full_unstemmed	Mechanical properties of ceramic tiles by replacement of quartz by RHA and POFA
title_sort	mechanical properties of ceramic tiles by replacement of quartz by rha and pofa
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Faculty of Science, Technology and Human Development
publishDate	2015
url	http://eprints.uthm.edu.my/1514/2/HASSAN%20USMAN%20JAMO%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1514/1/24p%20HASSAN%20USMAN%20JAMO.pdf http://eprints.uthm.edu.my/1514/3/HASSAN%20USMAN%20JAMO%20WATERMARK.pdf
_version_	1747830807427284992

Mechanical properties of ceramic tiles by replacement of quartz by RHA and POFA

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