Uso do agregado de entulho da construção civil de Manaus - AM para obtenção de bloco de argamassa celular

Abstract

In building construction, we have searched for mechanisms through new technologies which enable the sustainability of this productive activity, respecting the environmental issues and the shortage of natural products. Civil construction industry has searched for construction and demolition recycling (RCD) as a way of mitigating the environmental impact and a way of seeking for an alternative source of raw material. Associated with this concern, large consumer centers in the Amazon region, such as Manaus, have been using aggregates to produce concrete and mortar mined from the riverbeds and brought from great distances. This work aims to study the acquisition of blocks of masonry mortar cell, using clusters of RCD as a substitute for conventional aggregate. The blocks of mortar cell are widely used in Europe as masonry units due to their thermal and acoustic isolation abilities, which constitute very important parameters for building elements in warm climates. In Manaus, there are companies that build houses with mortar and monolithic cells, i.e., all the walls of the residence are molded in a single step. Thus, after obtaining and characterizing the ash fraction of RCD, we used a commercial composition of mortar cell to analyze the substitution of the alternative aggregates by RCD. With this procedure we searched to obtain a more economic dosage with the strength required by the Brazilian standard blocks and minimize the environmental impact of conventional mortar cells. The technique results were positive, with the potential of consuming RCD aggregates, thus contributing to the environmental management of this civil construction waste.