Characterization and properties of bamboo ash replacement in fly ash based geopolymer concrete

Malaysia, as a tropical rainforest country, enjoys an abundance of bamboo plant that proliferate throughout the country. The application of geopolymer technology has become a trend and preserves the environment from harm. Fly ash geopolymer concrete has low early strength and requires 24 hours for t...

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Main Author:	Ishak, Shafiq
Format:	Thesis
Language:	English
Published:	2018
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/79513/1/ShafiqIshakMFKA2018.pdf
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spelling	my-utm-ep.795132018-10-31T12:52:58Z Characterization and properties of bamboo ash replacement in fly ash based geopolymer concrete 2018 Ishak, Shafiq TA Engineering (General). Civil engineering (General) Malaysia, as a tropical rainforest country, enjoys an abundance of bamboo plant that proliferate throughout the country. The application of geopolymer technology has become a trend and preserves the environment from harm. Fly ash geopolymer concrete has low early strength and requires 24 hours for the concrete to harden. Thus, the presence of calcium and potassium content in bamboo ash could remedy this problem. Besides, there is no research regarding the use of bamboo ash as a binder in geopolymer concrete. Therefore, the presence of bamboo ash could improve the research field with the use of agriculture waste in a building construction. The research aim is to use bamboo ash in the production of fly ash geopolymer concrete. The specimens were casted in 100mm x 100mm x 100mm cubes and sodium based activator were used as the alkaline solutions. The binders are formulated with different binder ratio and solution to binder ratio. All test specimens were cured at ambient temperature (23°C -25°C) and 100% fly ash was chosen as control specimen. For fresh state properties, 3 tests were conducted, which are setting time, flow table and geopolymerization test. For hardened state properties, 10 different experiments were tested which are compressive strength, flexural strength, splitting tensile strength, modulus of elasticity, ultrasonic pulse velocity, water absorption, density, drying shrinkage, thermal expansion and elevated temperature. Lastly, phase analysis and microstructure analysis were conducted for 7 days and 28 days of curing age. The test results depicted that as the percentage of bamboo ash decreases, compressive strength increases. Also, the addition of 5% of bamboo ash into fly ash geopolymer concrete could improve the early strength in 7 days. The results were proven with the phase analysis that explains the effectiveness of the formation of sodium aluminate silicate hydrate (NASH) and calcium aluminate silicate hydrate (CASH) for the strength of geopolymer matrix. Furthermore, addition of 5% of bamboo ash reduced the setting time of fly ash geopolymer concrete by 40%. The addition of bamboo ash improved tensile strength and also compressive strength when exposed to elevated temperature of 800°C. Therefore, it can be concluded that the addition of bamboo ash improved the early strength, setting time, tensile strength and compressive strength when exposed to high temperature. 2018 Thesis http://eprints.utm.my/id/eprint/79513/ http://eprints.utm.my/id/eprint/79513/1/ShafiqIshakMFKA2018.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Ishak, Shafiq Characterization and properties of bamboo ash replacement in fly ash based geopolymer concrete
description	Malaysia, as a tropical rainforest country, enjoys an abundance of bamboo plant that proliferate throughout the country. The application of geopolymer technology has become a trend and preserves the environment from harm. Fly ash geopolymer concrete has low early strength and requires 24 hours for the concrete to harden. Thus, the presence of calcium and potassium content in bamboo ash could remedy this problem. Besides, there is no research regarding the use of bamboo ash as a binder in geopolymer concrete. Therefore, the presence of bamboo ash could improve the research field with the use of agriculture waste in a building construction. The research aim is to use bamboo ash in the production of fly ash geopolymer concrete. The specimens were casted in 100mm x 100mm x 100mm cubes and sodium based activator were used as the alkaline solutions. The binders are formulated with different binder ratio and solution to binder ratio. All test specimens were cured at ambient temperature (23°C -25°C) and 100% fly ash was chosen as control specimen. For fresh state properties, 3 tests were conducted, which are setting time, flow table and geopolymerization test. For hardened state properties, 10 different experiments were tested which are compressive strength, flexural strength, splitting tensile strength, modulus of elasticity, ultrasonic pulse velocity, water absorption, density, drying shrinkage, thermal expansion and elevated temperature. Lastly, phase analysis and microstructure analysis were conducted for 7 days and 28 days of curing age. The test results depicted that as the percentage of bamboo ash decreases, compressive strength increases. Also, the addition of 5% of bamboo ash into fly ash geopolymer concrete could improve the early strength in 7 days. The results were proven with the phase analysis that explains the effectiveness of the formation of sodium aluminate silicate hydrate (NASH) and calcium aluminate silicate hydrate (CASH) for the strength of geopolymer matrix. Furthermore, addition of 5% of bamboo ash reduced the setting time of fly ash geopolymer concrete by 40%. The addition of bamboo ash improved tensile strength and also compressive strength when exposed to elevated temperature of 800°C. Therefore, it can be concluded that the addition of bamboo ash improved the early strength, setting time, tensile strength and compressive strength when exposed to high temperature.
format	Thesis
qualification_level	Master's degree
author	Ishak, Shafiq
author_facet	Ishak, Shafiq
author_sort	Ishak, Shafiq
title	Characterization and properties of bamboo ash replacement in fly ash based geopolymer concrete
title_short	Characterization and properties of bamboo ash replacement in fly ash based geopolymer concrete
title_full	Characterization and properties of bamboo ash replacement in fly ash based geopolymer concrete
title_fullStr	Characterization and properties of bamboo ash replacement in fly ash based geopolymer concrete
title_full_unstemmed	Characterization and properties of bamboo ash replacement in fly ash based geopolymer concrete
title_sort	characterization and properties of bamboo ash replacement in fly ash based geopolymer concrete
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2018
url	http://eprints.utm.my/id/eprint/79513/1/ShafiqIshakMFKA2018.pdf
_version_	1747818244658429952

Characterization and properties of bamboo ash replacement in fly ash based geopolymer concrete

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