Open Science Research Excellence
%0 Journal Article
%A M. Saidi and  F. Ait-Medjber and  B. Safi and  M. Samar
%D 2014 
%J  International Journal of Civil and Environmental Engineering
%B World Academy of Science, Engineering and Technology
%I International Science Index 96, 2014
%T Recycling of Aggregates from Construction Demolition Wastes in Concrete: Study of Physical and Mechanical Properties
%V 96
%X This work is focused on the study of valuation of
recycled concrete aggregates, by measuring certain properties of
concrete in the fresh and hardened state. In this study, rheological
tests and physic-mechanical characterization on concretes and
mortars were conducted with recycled concrete whose geometric
properties were identified aggregates. Mortars were elaborated with
recycled fine aggregate (0/5mm) and concretes were manufactured
using recycled coarse aggregates (5/12.5 mm and 12.5/20 mm). First,
a study of the mortars was conducted to determine the effectiveness
of polycarboxylate superplasticizer on the workability of these and
their action deflocculating of the recycled sand. The rheological
behavior of mortars based on fine aggregate recycled was
characterized. The results confirm that the mortars composed of
different fractions of recycled sand (0 /5) have a better mechanical
properties (compressive and flexural strength) compared to normal
mortar. Also, the mechanical strengths of concretes made with
recycled aggregates (5/12.5 mm and 12.5/20 mm), are comparable to
those of conventional concrete with conventional aggregates,
provided that the implementation can be improved by the addition of
a superplasticizer.

%P 1307 - 1311