Acoustic and non-acoustic performance of coal bottom ash as sound absorptive material for reducing railway noise level

The development of new technology and rapid development in many countries have led to various types of pollution, especially acoustic pollution in urban areas. Furthermore, the huge production of Coal Bottom Ash (CBA) is treated as waste and often placed into impoundment ponds, silos or landfills, w...

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Main Author:	Ramzi Hannan, Nurul Izzati Raihan
Format:	Thesis
Language:	English English English
Published:	2019
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.uthm.edu.my/113/1/24p%20NURUL%20IZZATI%20RAIHAN%20RAMZI%20HANNAN.pdf http://eprints.uthm.edu.my/113/2/NURUL%20IZZATI%20RAIHAN%20RAMZI%20HANNAN%20WATERMARK.pdf http://eprints.uthm.edu.my/113/3/NURUL%20IZZATI%20RAIHAN%20RAMZI%20HANNAN%20COPYRIGHT%20DECLARATION.pdf
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id	my-uthm-ep.113
record_format	uketd_dc
spelling	my-uthm-ep.1132021-06-22T08:06:01Z Acoustic and non-acoustic performance of coal bottom ash as sound absorptive material for reducing railway noise level 2019-09 Ramzi Hannan, Nurul Izzati Raihan TA Engineering (General). Civil engineering (General) The development of new technology and rapid development in many countries have led to various types of pollution, especially acoustic pollution in urban areas. Furthermore, the huge production of Coal Bottom Ash (CBA) is treated as waste and often placed into impoundment ponds, silos or landfills, which has contributed to environmental issues. Usage of CBA in concrete production in reducing railway noise pollution reduce the environmental pollution. This study presents the acoustic and non-acoustic performance for a new concrete product that consists mainly of CBA. Grade 30 MPa concrete was cast with varying replacement percentages (0% to 100%) of CBA as fine aggregate replacement in concrete mixture. The specimens were cured for periods of 7, 28 and 90 days. The non-acoustic performance of CBA concrete demonstrated similar or even better performance than normal concrete by conducting compressive strength, splitting tensile strength, water absorption, water permeability and ultrasonic pulse velocity. The increase in CBA percentage in the concrete mixture has affected the compressive strength and splitting tensile strength of the sample which were lower than that of control concrete. CBA concrete can be recommended as good concrete due to its absorption properties. Based on the sound test conducted according to ISO 11654: 1997, it was found that CBA concrete can be classified as Class D (absorption). Class D materials are able to absorb more than 30% of sound by conducting impedance tube and reverberation time. In addition, the Noise Reduction Coefficient (NRC) performance for CBA concrete addresses more than 35% of the absorbed railway sound. CBA concrete showed an improvement in acoustic properties compared to normal concrete as it is able to reduce up to 3.74 dB of the existing railway noise level while normal concrete can only reduce up to 1.94 dB of the existing noise level. 2019-09 Thesis http://eprints.uthm.edu.my/113/ http://eprints.uthm.edu.my/113/1/24p%20NURUL%20IZZATI%20RAIHAN%20RAMZI%20HANNAN.pdf text en public http://eprints.uthm.edu.my/113/2/NURUL%20IZZATI%20RAIHAN%20RAMZI%20HANNAN%20WATERMARK.pdf text en validuser http://eprints.uthm.edu.my/113/3/NURUL%20IZZATI%20RAIHAN%20RAMZI%20HANNAN%20COPYRIGHT%20DECLARATION.pdf text en staffonly phd doctoral Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Awam dan Alam Bina
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Ramzi Hannan, Nurul Izzati Raihan Acoustic and non-acoustic performance of coal bottom ash as sound absorptive material for reducing railway noise level
description	The development of new technology and rapid development in many countries have led to various types of pollution, especially acoustic pollution in urban areas. Furthermore, the huge production of Coal Bottom Ash (CBA) is treated as waste and often placed into impoundment ponds, silos or landfills, which has contributed to environmental issues. Usage of CBA in concrete production in reducing railway noise pollution reduce the environmental pollution. This study presents the acoustic and non-acoustic performance for a new concrete product that consists mainly of CBA. Grade 30 MPa concrete was cast with varying replacement percentages (0% to 100%) of CBA as fine aggregate replacement in concrete mixture. The specimens were cured for periods of 7, 28 and 90 days. The non-acoustic performance of CBA concrete demonstrated similar or even better performance than normal concrete by conducting compressive strength, splitting tensile strength, water absorption, water permeability and ultrasonic pulse velocity. The increase in CBA percentage in the concrete mixture has affected the compressive strength and splitting tensile strength of the sample which were lower than that of control concrete. CBA concrete can be recommended as good concrete due to its absorption properties. Based on the sound test conducted according to ISO 11654: 1997, it was found that CBA concrete can be classified as Class D (absorption). Class D materials are able to absorb more than 30% of sound by conducting impedance tube and reverberation time. In addition, the Noise Reduction Coefficient (NRC) performance for CBA concrete addresses more than 35% of the absorbed railway sound. CBA concrete showed an improvement in acoustic properties compared to normal concrete as it is able to reduce up to 3.74 dB of the existing railway noise level while normal concrete can only reduce up to 1.94 dB of the existing noise level.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Ramzi Hannan, Nurul Izzati Raihan
author_facet	Ramzi Hannan, Nurul Izzati Raihan
author_sort	Ramzi Hannan, Nurul Izzati Raihan
title	Acoustic and non-acoustic performance of coal bottom ash as sound absorptive material for reducing railway noise level
title_short	Acoustic and non-acoustic performance of coal bottom ash as sound absorptive material for reducing railway noise level
title_full	Acoustic and non-acoustic performance of coal bottom ash as sound absorptive material for reducing railway noise level
title_fullStr	Acoustic and non-acoustic performance of coal bottom ash as sound absorptive material for reducing railway noise level
title_full_unstemmed	Acoustic and non-acoustic performance of coal bottom ash as sound absorptive material for reducing railway noise level
title_sort	acoustic and non-acoustic performance of coal bottom ash as sound absorptive material for reducing railway noise level
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Awam dan Alam Bina
publishDate	2019
url	http://eprints.uthm.edu.my/113/1/24p%20NURUL%20IZZATI%20RAIHAN%20RAMZI%20HANNAN.pdf http://eprints.uthm.edu.my/113/2/NURUL%20IZZATI%20RAIHAN%20RAMZI%20HANNAN%20WATERMARK.pdf http://eprints.uthm.edu.my/113/3/NURUL%20IZZATI%20RAIHAN%20RAMZI%20HANNAN%20COPYRIGHT%20DECLARATION.pdf
_version_	1747830532224319488

Acoustic and non-acoustic performance of coal bottom ash as sound absorptive material for reducing railway noise level

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