DBPapers
DOI: 10.5593/SGEM2014/B51/S20.087

STUDY OF HEAVY METALS RELEASING FROM CONCRETE COMPOSITES

A. Estokova, J. Oravec, M. Ondova
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-17-9 / ISSN 1314-2704, June 19-25, 2014, Book 5, Vol. 1, 637-642 pp

ABSTRACT
The paper is aimed at the study of selected heavy metals releasing from the concrete materials based on the waste utilization. In spite of the solidification process, trace
concentrations of metals are released from the concrete materials depending on the
environment which is building material exposed to. To study the leachability of heavy
metals from cement composites the concrete samples containing 95% special additive based on slag as a replacement of Portland cement as well as samples without this special additive have been studied. the analysed samples were exposed to various liquid media (distilled water, rain water and Britton-Robinson buffer) during 30 days. Leachates composition was analysed by using colorimetric method in terms of chromium and barium ions concentrations. The pH value and conductivity of leachates at the beginning and after the 30-day experiment were determined.

Keywords: heavy metals, cement composite, chromium, barium