Avaliação da resistência a compressão e aderência de argamassas dosadas com pó de brita e areia natural

Abstract

Civil construction is one of the largest consumers of natural raw materials in the world, and in this respect, attention is focused on environmental preservation. The removal of sand from a river can degrade its natural channel, lead to an increase in flow and intensify the destruction of the banks. The use of alternative aggregates arises from the thought of the depletion of conventional aggregates. This study proposes the use of “gravel powder (stone powder), with the aim of providing the replacement of natural aggregates, thus observing the environmental impact of construction activities. To this end, technically and economically, the replacement of natural sand in laying and coating mortars with stone powder, which is the residue of quarrying, was evaluated technically and economically. Thus, by conducting experimental research and laboratory tests, it was found that crushed stone powder, when compared to sand, has higher resistances when the specimens were protected from saturation. Furthermore, for coating, satisfactory results were obtained that were higher or equivalent to those of mortar produced with sand. It should be noted that the alternative aggregate costs about 30.7% less than sand, which makes its purchase and use feasible. It is noteworthy that this research is based on the importance of sustainability in civil works and its role in the construction of smart cities. In this way, one can consider a proposed solution as sustainable, as it encompasses a relevant social pillar with regard to waste recycling, an economic pillar in reducing costs and an environmental pillar in reducing the use of natural resources.