DBPapers
DOI: 10.5593/SGEM2014/B51/S20.056

LEACHING OF CONCRETE COMPOSITES CAUSED BY CHEMICAL CORROSION MODELING

V. O. Harbulakova, A. Estokova, A. Luptakovava, N. Stevulova, M. Repka
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, 413-420 pp

ABSTRACT
The problem of durability of concrete with cement as binding material comes more and more to the fore with the increased use of concrete, with the changed production and utilization conditions, and with the further development and adaptation of concrete properties by changing concrete composition. The major problem, however, is the concrete exposition to aggressive environments, which can lead to material corrosion. Chemical corrosion can be caused due to attack of aggressive media naturally existing in environment such as hydrogen sulphide and its derivatives. In this paper the prepared concrete samples of different mixtures were investigated by modeling the chemical corrosion using H2SO4 and Al2(SO4)3 solutions. The concrete leaching in different acidic environments as well as in distilled water, representing reference medium, was investigated by pH changes of liquid media. The concrete deterioration study in model conditions shows the course of impact of chemical processes, whereby the protection of concrete against aggressive environment can be proposed, but confrontation with in-situ experiments are needed.

Keywords: deterioration, concrete, leachate