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IBRACON Structures and Materials Journal • 2012 • vol. 5 • nº 5
Concrete properties produced with recycled coarse aggregates
However, that will only come to be extremely a limiting factor
to the use of those concretes in the case of those structures in
that the same ones are apparent. The Brazilian Norm of project
reinforced concrete structures mentions that coatings can be
applied on the concrete in the intention of protecting the mate-
rial of the noxious environmental conditions.
n
The concrete properties were revealed sensitive to the de-
crease of the porosity of the recycled coarse aggregate so that
the values of these tended, in some cases, to be very close or
until overcoming the values of the properties of the conven-
tional concretes.
Based on the results found in this study for the RAC properties,
it seems possible the use of this material in structural elements
since observed their particularities and other mechanical proper-
ties, dimensional and of durable, which can come to be factors
limits in some structural applications. Furthermore, in the case of
application in structures, testing for verification of contaminants in
the recycled aggregates must be performed in order to avoid pos-
sible pathologies.
The results reached in the concretes with recycled aggregate of
larger density showed that the aggregate’s density, which is re-
lated to the resistance and porosity of the same, and that had a
great influence in the obtained concrete properties. Therefore, this
property can be a decisive factor for obtaining structural concretes.
5. Acknowledgements
Partial financial support for this work was provided by MCT/FINEP
(Ministry of the Science and Technology/Financial of Studies and
Projects). The Laboratory of Structures and Materials of the Center
of Technology and the PPGEC (Program of Masters degree in Civil
Engineering). Jonathas J. L. Tenório was funded by the CAPES
(Co-ordination of Improvement of Personnel of Superior Level)
during his master’s degree at the Federal University of Alagoas
(UFAL), Brazil. BASF by chemical additive used in this study.
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