Investigation on leaching behaviour of fly ash and bottom ash replacement in self-compacting concrete

Abdul Kadir, Aeslina and Hassan, Mohd Ikhmal Hakeem and Abdullah, Mohd Mustafa Al Bakri (2016) Investigation on leaching behaviour of fly ash and bottom ash replacement in self-compacting concrete. In: International Conference on Innovative Research 2016 - ICIR Euroinvent 2016, 19th-20th May 2016, Iasi, Romania.

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Abstract

Fly ash and bottom ash are some of the waste generated by coal-fired power plants, which contains large quantities of toxic and heavy metals. In recent years, many researchers have been interested in studying on the properties of self-compacting concrete incorporated with fly ash and bottom ash but there was very limited research from the combination of fly ash and bottom ash towards the environmental needs. Therefore, this research was focused on investigating the leachability of heavy metals of SCC incorporated with fly ash and bottom ash by using Toxicity Characteristic Leaching Procedure, Synthetic Precipitation Leaching Procedure and Static Leaching Test. The samples obtained from the coal-fired power plant located at Peninsula, Malaysia. In this study, the potential heavy metals leached out from SCC that is produced with fly ash as a replacement for Ordinary Portland Cement and bottom ash as a substitute for sand with the ratios from 10% to 30% respectively were designated and cast. There are eight heavy metals of concern such as As, Cr, Pb, Zn, Cu, Ni, Mn and Fe. The results indicated that most of the heavy metals leached below the permissible limits from the United States Environmental Protection Agency and World Health Organization limit for drinking water. As a conclusion, the minimum leaching of the heavy metals from the incorporation of fly ash and bottom ash in self-compacting concrete was found in 20% of fly ash and 20% of bottom ash replacement. The results also indicate that this incorporation could minimize the potential of environmental problems.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions:Faculty of Civil and Environmental Engineering > Department of Water and Environmental Engineering
ID Code:8466
Deposited By:Mr. Mohammad Shaifulrip Ithnin
Deposited On:24 May 2017 15:57
Last Modified:24 May 2017 15:57

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