LIRA, M. O.; http://lattes.cnpq.br/8633788697488599; LIRA, Matheus Oliveira.
Résumé:
The waste disposal and reuse processes are strong points in the discussions and
studies related to the conservation of the environment since the man realized this
need. At the same time, studies are focused on the discovery of new raw
materials and technologies for the most diverse segments of activities in order to
avoid the scarcity of various products. Polyethylene terephthalate (PET) is a
thermoplastic widely used for the manufacture of packaging, namely carbonated
beverage bottles, having low density, transparency, brightness, good
performance in different designs, Safety and ease of molding, as well as providing
high mechanical and chemical resistance. Its use generates a large volume of
improperly disposed waste in the environment, which generates serious
environmental impacts. Thus, the objective of this project is to evaluate the
miscrotructure of mortar incorporated with micronized PET in partial substitution
to the small aggregate in the contents 20% e 30%. The specimens were molded
in 5 cm x 10 cm dimensions and the physical, mechanical and microstructure
properties of mortars at 7, 14 and 28 days were evaluated. Compared with
reference mortars, an increase in water absorption and void index was found.
The simple compression tests indicated that the mortar strength decreases as
the percentage of PET incorporation increases, and, for both levels, the results
were lower than those of the reference samples. The SEM investigation identified
that the mortars incorporated with PET have an irregular and heterogeneous
matrix, with voids in the structure.
