Tijolos de adobe de solo-gesso com adição de resíduo de recapagem de pneus

Abstract

The Civil Construction Industry (CCI) has a great influence on the generation of residue, degradation and environmental impacts, which can be observed in all its construction stages, mainly in the incorrect disposal of the waste and the misuse of the materials’ reuse potential. Therefore, it is necessary to reduce or reuse the waste generated by the sector. In this context, soil construction techniques, such as adobe bricks, present themselves as practices that generate less impact than convectional construction techniques. Based on that, the current article searched to investigate the behavior of stabilized-soil adobe bricks with recycled plaster, with the incorporation of waste from tire retreading, retardant additive, and hydrofugant additive. For this purpose, compressive strength tests were performed on blocks produced; evaluation of the behavior of the blocks in the presence of water; and retraction tests. For all the evaluated contents, the presence of fibers led to a decrease of significant resistance in relation to the control mixture. Although the incorporation of the rubber residue has reduced the retraction of the material, it has not yet been sufficient to fulfil the recommendations of the literature. Separately, the additives did not promote significant variations of resistance, but when added simultaneously there was a significant loss of resistance compared to the control mixture. In none of the evaluated situations the additives conferred the expected properties in relation to sensitivity in the presence of water, and possibility of mechanized production. The difficulties encountered in the course of this article can be overcome with the use of other types of fiber, and higher additive dosages.