Studies of geopolymerization route for metakaolin geopolymeric materials

Investigation on production of metakaolin geopolymeric powder was aimed to increase the productivity and application of geopolymer products. Geopolymerization process was applied in the manufacturing of metakaolin geopolymeric powder to be used in geopolymer synthesis. Geopolymer slurry was made b...

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Main Author:	Liew, Yun Ming
Format:	Thesis
Language:	English
Subjects:	Metakaolin Geopolymerization Geopolymers Metakaolin geopolymeric powder
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44205/1/p.1-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44205/2/full%20text.pdf
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spelling	my-unimap-442052016-11-29T10:03:28Z Studies of geopolymerization route for metakaolin geopolymeric materials Liew, Yun Ming Prof. Dr. Khairul Nizar Investigation on production of metakaolin geopolymeric powder was aimed to increase the productivity and application of geopolymer products. Geopolymerization process was applied in the manufacturing of metakaolin geopolymeric powder to be used in geopolymer synthesis. Geopolymer slurry was made by alkaline activation of metakaolin in alkali activator solution (a mixture of NaOH and sodium silicate solutions). The geopolymer slurry was heated in an oven to produce pre-cured paste and then pulverized to get uniform particle size geopolymeric powder. By adopting the concept of “just add water”, the metakaolin geopolymeric powder was mixed with water and then oven-cured to produce resulting geopolymer pastes. The physical and mechanical properties of geopolymeric powder and resulting geopolymer pastes, such as workability, setting time, bulk density and compressive strength were studied. These geopolymeric powder and resulting geopolymer pastes were also characterized by using SEM/EDX, XRD and FTIR analyses. The results showed that the optimum conditions for producing highest strength resulting paste are by using 8M of NaOH solution, solids/liquid ratio of 0.80, an activator ratio of 0.20, pre-curing of 80°C for 4 hours, 22% of mixing water and curing regime of 60°C for 72 hours. The resulting geopolymer pastes have low bulk density and were potential for a lightweight material. Upon the mixing of water with geopolymeric powder, densification of the structure occurred with the formation of compact geopolymer gels. The geopolymeric powder and resulting pastes showed the combination of amorphous and crystalline phases as analyzed by XRD. After ageing, the intensities of zeolites crystalline phases increased and this emphasized the benefit of zeolites in strength development of resulting pastes. Moreover, FTIR analysis revealed the growth of geopolymer bonding with ages. The optimum SiO2/Al2O3, Na2O/SiO2, H2O/Na2O and Na2O/Al2O3 oxide-molar ratios were 3.10, 0.37, 14.23 and 1.15, respectively. Study on the oxide-molar ratios concluded that mechanical properties of geopolymer paste were influenced most significantly by Na2O/Al2O3 and H2O/Na2O molar ratios. This study clearly demonstrates that the production of metakaolin geopolymeric powder was able to be used in manufacturing geopolymer pastes. Universiti Malaysia Perlis (UniMAP) 2014 Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/44205 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44205/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44205/1/p.1-24.pdf 089e711d41075e85d4967be38edc813b http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44205/2/full%20text.pdf d84af77b551d1ba06642c5eacc0edb02 Metakaolin Geopolymerization Geopolymers Metakaolin geopolymeric powder School of Materials Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Prof. Dr. Khairul Nizar
topic	Metakaolin Geopolymerization Geopolymers Metakaolin geopolymeric powder
spellingShingle	Metakaolin Geopolymerization Geopolymers Metakaolin geopolymeric powder Liew, Yun Ming Studies of geopolymerization route for metakaolin geopolymeric materials
description	Investigation on production of metakaolin geopolymeric powder was aimed to increase the productivity and application of geopolymer products. Geopolymerization process was applied in the manufacturing of metakaolin geopolymeric powder to be used in geopolymer synthesis. Geopolymer slurry was made by alkaline activation of metakaolin in alkali activator solution (a mixture of NaOH and sodium silicate solutions). The geopolymer slurry was heated in an oven to produce pre-cured paste and then pulverized to get uniform particle size geopolymeric powder. By adopting the concept of “just add water”, the metakaolin geopolymeric powder was mixed with water and then oven-cured to produce resulting geopolymer pastes. The physical and mechanical properties of geopolymeric powder and resulting geopolymer pastes, such as workability, setting time, bulk density and compressive strength were studied. These geopolymeric powder and resulting geopolymer pastes were also characterized by using SEM/EDX, XRD and FTIR analyses. The results showed that the optimum conditions for producing highest strength resulting paste are by using 8M of NaOH solution, solids/liquid ratio of 0.80, an activator ratio of 0.20, pre-curing of 80°C for 4 hours, 22% of mixing water and curing regime of 60°C for 72 hours. The resulting geopolymer pastes have low bulk density and were potential for a lightweight material. Upon the mixing of water with geopolymeric powder, densification of the structure occurred with the formation of compact geopolymer gels. The geopolymeric powder and resulting pastes showed the combination of amorphous and crystalline phases as analyzed by XRD. After ageing, the intensities of zeolites crystalline phases increased and this emphasized the benefit of zeolites in strength development of resulting pastes. Moreover, FTIR analysis revealed the growth of geopolymer bonding with ages. The optimum SiO2/Al2O3, Na2O/SiO2, H2O/Na2O and Na2O/Al2O3 oxide-molar ratios were 3.10, 0.37, 14.23 and 1.15, respectively. Study on the oxide-molar ratios concluded that mechanical properties of geopolymer paste were influenced most significantly by Na2O/Al2O3 and H2O/Na2O molar ratios. This study clearly demonstrates that the production of metakaolin geopolymeric powder was able to be used in manufacturing geopolymer pastes.
format	Thesis
author	Liew, Yun Ming
author_facet	Liew, Yun Ming
author_sort	Liew, Yun Ming
title	Studies of geopolymerization route for metakaolin geopolymeric materials
title_short	Studies of geopolymerization route for metakaolin geopolymeric materials
title_full	Studies of geopolymerization route for metakaolin geopolymeric materials
title_fullStr	Studies of geopolymerization route for metakaolin geopolymeric materials
title_full_unstemmed	Studies of geopolymerization route for metakaolin geopolymeric materials
title_sort	studies of geopolymerization route for metakaolin geopolymeric materials
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Materials Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44205/1/p.1-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44205/2/full%20text.pdf
_version_	1747836830186733568

Studies of geopolymerization route for metakaolin geopolymeric materials

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