BRITO, A. N. S. L.; http://lattes.cnpq.br/8956746911923255; BRITO, Alícia Nayana dos Santos Lima de.
Résumé:
The accumulation of waste generated, together with its irregular deposition in
the environment in which we live, presents itself as some of the biggest problems of today's
society. During the processing of vermiculite, residues are generated and accumulated
randomly in the environment, causing impacts to the surrounding region. Therefore, the
objective of this research was to develop mortar with partial replacement of artificial sand by
vermiculite residue for the production of a prototype of hydraulic floor tile. With the
acquisition of vermiculite residue, it went through a characterization process, evaluating its
feasibility to compose the mortar. Subsequently, mortars with a 1:4 mix (cement: artificial
sand) were prepared, using Portland cement CP V-ARI, replacing the artificial sand with
vermiculite residue at 0%, 10%, 30% and 50% and with a water/cement factor between 0.9
and 1.18. With the preparation, the mortars were evaluated in their hardened state at 7, 14 and
21 days, by means of compressive strength, capillary absorption and immersion absorption
tests. With the best result, the prototype of the hydraulic tile was formulated (using
commercially available molds), having been visually analyzed, verifying uniformity of the
surface finish (internal and external face) and the quality of the molding, as well as the
dimensional conformity with the used mold. The characterization of the vermiculite residue
showed a high level of fines, which led to the filling of existing voids in the mortar, enabling
the applicability of the mortar containing 10% of vermiculite residue, having a general
absorption (capillary and immersion) that does not significantly affect its mechanical capacity
to resist loads, being this last characteristic, greater among the other mortars. In view of this
behavior, the same was applied in the production of the tile prototype, resulting in pieces that
were presented in accordance with their molds, satisfactory surface finish and without
undesirable dimensional variations, noting the effectiveness of the technical feasibility of the
use of vermiculite residue in this type of building material.