Pazzolanic properties of hydrothermal silica gel extracted from sugarcane bagasse using eco-friendly approach

In the production of sustainable concrete, it is quite essential to develop highly reactive silica rich materials to substitute cement. Sugarcane bagasse ash as one of the agricultural based pozzolan gained less popularity due to its relatively low amorphous silica content after incineration process...

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Main Author:	Rahimah, Embong
Format:	Thesis
Language:	English
Published:	2016
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/16955/19/Pazzolanic%20properties%20of%20hydrothermal%20silica%20gel%20extracted%20from%20sugarcane%20bagasse%20using%20eco-friendly%20approach.pdf
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spelling	my-ump-ir.169552021-12-01T00:19:23Z Pazzolanic properties of hydrothermal silica gel extracted from sugarcane bagasse using eco-friendly approach 2016-03 Rahimah, Embong TA Engineering (General). Civil engineering (General) In the production of sustainable concrete, it is quite essential to develop highly reactive silica rich materials to substitute cement. Sugarcane bagasse ash as one of the agricultural based pozzolan gained less popularity due to its relatively low amorphous silica content after incineration process (< 50% silica). Therefore, an alternative approach was studied in this research to extract high proportion of amorphous silica from sugarcane bagasse that fulfils the minimum requirement of pozzolanic standard. The process was divided into three stages, which were obtaining optimum pre-treatment variables, obtaining optimum burning variables, and substantiation of pozzolanic feature. Pre-treatment variables were done to remove all impurities and deleterious material from the ash. It involved soaking of bagasse in different concentration of hydrochloric acid solution (0.1M, 0.5M and 1.OM) for different interval of time (1,2 and 3 hours) after which it was dried in a dedicated solar drying chamber for 48 hours. The optimum combination of hydrochloric acid concentration and soaking time was identified based on atomic absorption spectroscopy and x-ray fluorescence. Bagasse treated with optimum parameter would then undergo burning process with various temperatures (600,700 and 800°C) and durations (1, 2 and 3 hours). The produced ash was characterized by determining its oxides composition, particle size analysis, specific surface area, pore volume, mineralogical characteristics and micro-structure using xray fluorescence, x-ray diffraction and field emission scanning electron microscope, respectively. 0.1 M has emerged as the best concentrations with the extraction of silica could reach 83-89% with 1 hour soaking duration. 1 hour burning at 800°C concluded as the most feasible in producing amorphous state of ash. The ash obtained with optimum parameters was amorphous, chemically stable, and ultra-fine. The optimum ash was tested for its pozzolanic reactivity and indicated quite high pozzolanic reactivity index, which contributed to the significant improvement on the compressive strength properties of cementitious mortar of untreated, treated and silica gel at 2.5 and 5% replacement. 2016-03 Thesis http://umpir.ump.edu.my/id/eprint/16955/ http://umpir.ump.edu.my/id/eprint/16955/19/Pazzolanic%20properties%20of%20hydrothermal%20silica%20gel%20extracted%20from%20sugarcane%20bagasse%20using%20eco-friendly%20approach.pdf pdf en public http://iportal.ump.edu.my/lib/item?id=chamo:98324&theme=UMP2 masters Universiti Malaysia Pahang Faculty of Civil Engineering & Earth Resources
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Rahimah, Embong Pazzolanic properties of hydrothermal silica gel extracted from sugarcane bagasse using eco-friendly approach
description	In the production of sustainable concrete, it is quite essential to develop highly reactive silica rich materials to substitute cement. Sugarcane bagasse ash as one of the agricultural based pozzolan gained less popularity due to its relatively low amorphous silica content after incineration process (< 50% silica). Therefore, an alternative approach was studied in this research to extract high proportion of amorphous silica from sugarcane bagasse that fulfils the minimum requirement of pozzolanic standard. The process was divided into three stages, which were obtaining optimum pre-treatment variables, obtaining optimum burning variables, and substantiation of pozzolanic feature. Pre-treatment variables were done to remove all impurities and deleterious material from the ash. It involved soaking of bagasse in different concentration of hydrochloric acid solution (0.1M, 0.5M and 1.OM) for different interval of time (1,2 and 3 hours) after which it was dried in a dedicated solar drying chamber for 48 hours. The optimum combination of hydrochloric acid concentration and soaking time was identified based on atomic absorption spectroscopy and x-ray fluorescence. Bagasse treated with optimum parameter would then undergo burning process with various temperatures (600,700 and 800°C) and durations (1, 2 and 3 hours). The produced ash was characterized by determining its oxides composition, particle size analysis, specific surface area, pore volume, mineralogical characteristics and micro-structure using xray fluorescence, x-ray diffraction and field emission scanning electron microscope, respectively. 0.1 M has emerged as the best concentrations with the extraction of silica could reach 83-89% with 1 hour soaking duration. 1 hour burning at 800°C concluded as the most feasible in producing amorphous state of ash. The ash obtained with optimum parameters was amorphous, chemically stable, and ultra-fine. The optimum ash was tested for its pozzolanic reactivity and indicated quite high pozzolanic reactivity index, which contributed to the significant improvement on the compressive strength properties of cementitious mortar of untreated, treated and silica gel at 2.5 and 5% replacement.
format	Thesis
qualification_level	Master's degree
author	Rahimah, Embong
author_facet	Rahimah, Embong
author_sort	Rahimah, Embong
title	Pazzolanic properties of hydrothermal silica gel extracted from sugarcane bagasse using eco-friendly approach
title_short	Pazzolanic properties of hydrothermal silica gel extracted from sugarcane bagasse using eco-friendly approach
title_full	Pazzolanic properties of hydrothermal silica gel extracted from sugarcane bagasse using eco-friendly approach
title_fullStr	Pazzolanic properties of hydrothermal silica gel extracted from sugarcane bagasse using eco-friendly approach
title_full_unstemmed	Pazzolanic properties of hydrothermal silica gel extracted from sugarcane bagasse using eco-friendly approach
title_sort	pazzolanic properties of hydrothermal silica gel extracted from sugarcane bagasse using eco-friendly approach
granting_institution	Universiti Malaysia Pahang
granting_department	Faculty of Civil Engineering & Earth Resources
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/16955/19/Pazzolanic%20properties%20of%20hydrothermal%20silica%20gel%20extracted%20from%20sugarcane%20bagasse%20using%20eco-friendly%20approach.pdf
_version_	1783732017778655232

Pazzolanic properties of hydrothermal silica gel extracted from sugarcane bagasse using eco-friendly approach

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