VALORISATION DES FRAISATS ROUTIERS ET PRODUITS DE DEMOLITION POUR LA FABRICATION DE MELANGES GRANULAIRES TRAITES AUX LIANTS HYDRAULIQUES (MGTLH)

Abstract

The objectives of this work are to promote the act of valorization and to show the significant potential of recycled material in roads construction. In this aims, the above research will present an experimental study for making granular mixtures, hydraulically bounded (MGTLH) from two recycled materials that are: 1) concrete demolition products and 2) Reclaimed asphalt materials. At the first stage, a characterization work was done, to understand especially the physical and mechanical properties of recycled materials. Furthermore, several mixtures incorporating these materials were formulated and which are compared with a control MGTLH based on aggregates quarry. Performance verifications focused on the ability to compaction via a Proctor study. Moreover, mechanical performances are verified using unconfined compressive strength, tensile test device and indirect measurements of elastic modulus values. Finally deformations of produced GTLH are checked through measurement of the total shrinkage. The results obtained show that the incorporation of these materials present lower performance that the control GTLH. However, remains significant and encouraging their admittance in the roads construction