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CHARACTERIZATION STUDY OF AGGREGATES PRODUCTION WASTE FOR FURTHER PROCESSING AND VALORIZATION

AUTHOR/S: M. SANCHEZ, L. MENANDEZ-AGUADO, J. R. GALLEGO, J. M. MENANDEZ-AGUADO
Sunday 1 August 2010 by Libadmin2008

8th International Scientific Conference - SGEM2008, www.sgem.org, SGEM2008 Conference Proceedings/ ISBN: 954-918181-2, June 16-20, 2008, Vol. 2, 389-398 pp

ABSTRACT

The treatment of natural rock, as well as construction aggregates and ornamental rock
creates a great amount of residues, which are usually grain sized under 100 μm and with
chemical and mineralogical composition modified due to processing. Therefore these
materials have a composition with a variable content of rock, accompanied with other
components as iron particles, clayey materials, flocculants, etc. These contaminants
limit the application of those wastes.

It is necessary therefore, the search of a process which would allow us to treat these
materials with the aim of obtaining a product which has a potential application and thus
a potential outlet, giving value to a problematic waste and obtaining a economic byproduct.
Giving that the products which they come from have in general a low added
value, the final product obtained will have a low value too, so the treatment process of
this kind of waste must be feasible and clean, for the waste itself (no energetic, non
metallic) is usually inert.

The mineral processing methods offer an effective technology which can make
economically viable the treatment of this type of wastes. In the current work has been
studied the residues arriving from the production of aggregates [1, 2, 3]. They were
characterized and processed removing the clayey component to obtain the cleanest
quartz fraction. In this way also was studied its potential application in the cement and
ceramic industry [4, 5], in the mixtures of concrete mortars and to obtain pelletizing
products.

Keywords: waste, aggregates, fines processing