Re-use of fluoride contaminated bone char sludge in concrete

Rao, Sudhakar M and Reddy, BV Venkatarama and Lakshmikanth, S and Ambika, NS (2009) Re-use of fluoride contaminated bone char sludge in concrete. In: Journal of Hazardous Materials, 166 (2-3). pp. 751-756.

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Abstract

Managing sludge generated by treating groundwater contaminated with geogenic contaminants (fluoride, arsenic, and iron) is a major issue in developing nations. Their re-use in civil engineering applications is a possible pathway for reducing the impact on the geo-environment. This paper examines the re-use of one such sludge material, namely, fluoride contaminated bone char sludge, as partial replacement for fine aggregate (river-sand) in the manufacture of dense concrete specimens. Bone char sludge is being produced by defluoridation of contaminated groundwater in Nalagonda District, Andhra Pradesh, India. The impact of admixing 1.5-9% sludge contents on the compression strength and fluoride leaching potential of the sludge admixed concrete (SAC) specimens are examined. The compression strengths of the SAC specimensa re examined with respect to strength criteria for manufacture of dense, load-bearing concrete blocks. The fluoride release potential of the SAC specimens is examined with respect to standards specific to disposal of treated leachate into inland surface water.

Item Type:	Journal Article
Publication:	Journal of Hazardous Materials
Publisher:	Elsevier Science B.V
Additional Information:	Copyright of this article belongs to Elsevier Science B.V.
Keywords:	Concrete; Groundwater; Fluoride; Re-cycle; Sludge
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	14 Dec 2009 06:19
Last Modified:	19 Sep 2010 05:36
URI:	http://eprints.iisc.ac.in/id/eprint/21119

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