Utilização de argamassa para reboco com adição de resíduo de tinta na substituição do agregado miúdo

Abstract

In this final paper we analyze the use of mortar for plastering with addition of paint residue to replace the fine aggregate, a mortar used for plastering indoors. The descriptive research method was used in order to analyze the results through the compressive strength test, water absorption and tensile bond strength test, by breaking 14 specimens with addition of 10% paint residue to replace the fine sand in the mix and another 14 specimens with 30% addition of the same residue to replace the fine aggregate. Although the mortars for plaster are not intended to resist compressive stresses, and no value is required for this test, the mixture used provided good resistance. In the bond strength to traction test, the results were also satisfactory, since they are higher than 0.3 MPa for external environments and 0.2 MPa for internal environments. Thus, the mortars can be used at lower cost and with better characteristics than those specified in the current standards.