Effect of bottom ash on the strength characteristics of fly ash and bottom ash mixtures

One of the sources to produce electricity is coal. The major problem of the coal combustion based power plant is producing huge quantities of solid waste. Fly ash (FA) and bottom ash (BA) are two major contributions in the coal combustion products (CPP). Generally, most CPP are just dumped into the...

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Main Author:	Ling, Jacky Jia Yii
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/33136/5/JackyLingJiaYiiMFKA2013.pdf
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spelling	my-utm-ep.331362017-09-12T08:25:54Z Effect of bottom ash on the strength characteristics of fly ash and bottom ash mixtures 2013-01 Ling, Jacky Jia Yii TP Chemical technology One of the sources to produce electricity is coal. The major problem of the coal combustion based power plant is producing huge quantities of solid waste. Fly ash (FA) and bottom ash (BA) are two major contributions in the coal combustion products (CPP). Generally, most CPP are just dumped into the waste pond. The insufficient place for waste dumping is becoming an issue since the amount of CPP waste is increasing drastically. Recently, there are efforts to use the FA and BA together as mixtures in geotechnical engineering works. This paper focuses on the effect of BA content on the strength characteristic of fly ash and bottom ash mixtures, for coal ash taken from the Tanjung Bin power plant in Johor, Malaysia. This study investigates the effect of curing period on the morphology, chemical and strength characteristic of FA-BA mixtures that consists of 30 % and 70% BA.The mixtures had been tested in laboratory through Scanning Electron Microscopic test, X-Ray Fluorescences test and Consolidated Undrained triaxial test. Major chemical compostion of FA-BA mixtures are silica, alumina, ferum oxide and calcium oxide. The value of modulus of elasticity decreased with the increase of bottom ash content from 30% to 70% in the ash mixtures. The internal friction angle at critical state,??c’, was decreased as the content of BA is increased from 30% to 70%. Without curing periods, the increased of BA content from 30% to 70% did not give any significant effect on the critical state shear strength. However, after 28 days curing periods, the ?c’ was increased, but it is not that significant. It is also observed that the ?c’ of both mixtures with 30%BA and 70%BA are in the same range as the typical dense sands. Generally, it can be concluded that there is no significant effect on the shear strength properties at critical state for FA-BA mixtures at 30%BA and 70%BA. Hence, there will be a great potential to use a large quantity of BA in the mixtures without compromising the strength which can be a great benefit for usage in various geotechnical engineering works. 2013-01 Thesis http://eprints.utm.my/id/eprint/33136/ http://eprints.utm.my/id/eprint/33136/5/JackyLingJiaYiiMFKA2013.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:70126?site_name=Restricted Repository masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Ling, Jacky Jia Yii Effect of bottom ash on the strength characteristics of fly ash and bottom ash mixtures
description	One of the sources to produce electricity is coal. The major problem of the coal combustion based power plant is producing huge quantities of solid waste. Fly ash (FA) and bottom ash (BA) are two major contributions in the coal combustion products (CPP). Generally, most CPP are just dumped into the waste pond. The insufficient place for waste dumping is becoming an issue since the amount of CPP waste is increasing drastically. Recently, there are efforts to use the FA and BA together as mixtures in geotechnical engineering works. This paper focuses on the effect of BA content on the strength characteristic of fly ash and bottom ash mixtures, for coal ash taken from the Tanjung Bin power plant in Johor, Malaysia. This study investigates the effect of curing period on the morphology, chemical and strength characteristic of FA-BA mixtures that consists of 30 % and 70% BA.The mixtures had been tested in laboratory through Scanning Electron Microscopic test, X-Ray Fluorescences test and Consolidated Undrained triaxial test. Major chemical compostion of FA-BA mixtures are silica, alumina, ferum oxide and calcium oxide. The value of modulus of elasticity decreased with the increase of bottom ash content from 30% to 70% in the ash mixtures. The internal friction angle at critical state,??c’, was decreased as the content of BA is increased from 30% to 70%. Without curing periods, the increased of BA content from 30% to 70% did not give any significant effect on the critical state shear strength. However, after 28 days curing periods, the ?c’ was increased, but it is not that significant. It is also observed that the ?c’ of both mixtures with 30%BA and 70%BA are in the same range as the typical dense sands. Generally, it can be concluded that there is no significant effect on the shear strength properties at critical state for FA-BA mixtures at 30%BA and 70%BA. Hence, there will be a great potential to use a large quantity of BA in the mixtures without compromising the strength which can be a great benefit for usage in various geotechnical engineering works.
format	Thesis
qualification_level	Master's degree
author	Ling, Jacky Jia Yii
author_facet	Ling, Jacky Jia Yii
author_sort	Ling, Jacky Jia Yii
title	Effect of bottom ash on the strength characteristics of fly ash and bottom ash mixtures
title_short	Effect of bottom ash on the strength characteristics of fly ash and bottom ash mixtures
title_full	Effect of bottom ash on the strength characteristics of fly ash and bottom ash mixtures
title_fullStr	Effect of bottom ash on the strength characteristics of fly ash and bottom ash mixtures
title_full_unstemmed	Effect of bottom ash on the strength characteristics of fly ash and bottom ash mixtures
title_sort	effect of bottom ash on the strength characteristics of fly ash and bottom ash mixtures
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2013
url	http://eprints.utm.my/id/eprint/33136/5/JackyLingJiaYiiMFKA2013.pdf
_version_	1747816088164368384

Effect of bottom ash on the strength characteristics of fly ash and bottom ash mixtures

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