Strength properties of untreated coal bottom ash as cement replacement

Baco, Noraziela Syahira and Shahidan, Shahiron and Mohd Zuki, Sharifah Salwa and Ali, Noorwirdawati and Mohammad Azmi, Mohamad Azim (2020) Strength properties of untreated coal bottom ash as cement replacement. Journal of Civil Engineering Forum, 6 (1). pp. 13-18. ISSN 25495925

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Abstract

Coal Bottom Ash (CBA) is a mineral by-product of thermal power plants obtained from the combustion of coal. In many countries, CBA wastes are identified as hazardous materials. The utilization of CBA can help in alleviating environmental problems; thus, this research was carried out to explore the possibility of its use as cement replacement in concrete manufacturing. Presently, In Malaysia, research that concerns about the use of CBA as cement replacement is very limited. Therefore, this study was aimed to investigate the properties of CBA as cement replacement and to identify the optimum percentage of untreated CBA as cement replacement. The CBA used in this study were taken from the Tanjung Bin power plant. In this research, the amount of CBA in the concrete mixture varied from 20% to 40% to replace cement. The properties of concrete containing CBA as cement replacement was examined through slump test, sieve analysis, concrete compressive strength test and splitting tensile strength test. The compressive strength test and splitting tensile strength test were performed at 7 and 28 days of curing time. Based on this research, it can be concluded that the optimum percentage of CBA as cement replacement is 25% for a curing time of both 7 and 28 days with the concrete compression strength of 45.2 MPa and 54.6 MPa, respectively. Besides, the optimum percentage for tensile strength is also at 25% CBA for a curing period of both 7 and 28 days with the tensile strength of 2.91 MPa and 3.28 MPa, respectively.

Item Type:	Article
Uncontrolled Keywords:	Coal Bottom Ash; Cement Replacement; Untreated; Concrete Material; Power Plant
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions:	Faculty of Civil Engineering and Built Environment > Department of Civil Engineering : Structural and Materials Engineering
Depositing User:	Miss Afiqah Faiqah Mohd Hafiz
Date Deposited:	03 Jan 2022 02:44
Last Modified:	03 Jan 2022 02:44
URI:	http://eprints.uthm.edu.my/id/eprint/4983

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