Estudo de tijolos de solo-cimento com substituição do solo por resíduos da construção civil na sua composição

Abstract

Sustainable construction is a way of building in balance with the environment, always seeking to minimize impacts on nature, being indispensable the use of recyclable materials and less environmental impact. Thus, there has been a growing concern to build with materials that produce less waste, or even allow its reuse. Thus, the soil-cement brick with the addition of construction residues presents itself as a product of great potential, as it has the advantages of being produced without the need for wood burning and allows the addition of recycled materials. Thus, this work has as main objective to study the behavior of soil-cement brick with replacement of soil by construction residues. For this, it was decided to work with the volume dosing 1:10 (cement: soil) with four different traits: 0%, 10%, 20% and 30% of residue in substitution of the soil volume. Characterization tests of materials, soil and construction residue were performed, as well as water absorption tests at 7 days and simple compressive strength at 7 and 28 days of age. The results showed that all traces with replacement of part of the soil by construction residues reached the average compressive strength of 2 MPa required by ABNT NBR 8491 (2012) at 28 days of age for sealing bricks. Statistical analysis was used with the ANOVA test, which demonstrated that the substitution of construction residues by the soil influences the average compressive strength of the bricks. And with the “T test” that showed that the trait that reaches higher resistance values, even higher than the reference, is the 10% substitution trait (TR10). Finally, the replacement of construction waste by soil is considered a sustainable alternative for the production of building components, in this case ecological bricks. Thus, it is concluded that the traces used in this research are ideal for the construction of soilcement bricks with non-structural function.