Evaluation of the properties of the covering mortar produced with construction and demolition waste as aggregate

Abstract

The Resolution nº 307/2002 of the Brazilian National Environment Council (Conama) that attributes to the constructor the responsibility for the final destination of the residues from the civil construction, it will lead to the reuse of construction and demolition waste (CDW). In such a way, the objective in this work consists in evaluating the properties of covering mortar produced with aggregates proceeding from CDW, in which the natural aggregate was substituted for the recycled one, in 30% and 50%, respectively. The results were compared to a reference trace that used air additive incorporating in substitution of the whitewash. Some properties of mortar were analyzed, in the plastic and hard state. The CDW mortar had its mechanical resistance improved in relation to the reference mortar and present a better performance when it comes to the properties analyzed. The results obtained made evident the environment benefits from the use of recycled aggregates with partial substitution of natural aggregates. However, more study of the properties of recycled aggregates is necessary to assure the CDW use.