Salomão Pereira de Almeida; http://lattes.cnpq.br/0078586074219346; ALMEIDA, Salomão Pereira de.
Résumé:
The polyethylene terephthalate (PET) is one of the most produced plastics in
the world because of the excellent relationship between their properties and
their relatively low cost of production. Howeve r, due to degradation of the time
be relatively long, when improperly disposed of, generating a large volume of
waste. The systematic recycling and reuse are solutions to minimize the impact
on the environment. Accordingly, the engineering floor can contribute finding
technical and environmentally suitable alternatives and can be interlocked
pavement of these alternatives. interlocked floors are made of precas t concrete
parts, whose surface layer should provide comfortable finish for the transit of
people and their structure must support vehicle loads. As the aggregates that
make up the parts can be natural or artificial, we sought to evaluate this work
the behavior of parts produced with the partial replacement of fine aggregate by
PET. Initially, characterization tests were conducted to determine the physical,
chemical, mineralogical and state of aggregate, cement and PET. Then, they
were molded parts with replacement of fine aggregate PET at 2.5% content,
5.0%, 7.5% and 10.0%. Used was drawn 1:1.5:1.5, 1:2:2 and 1:2.5:2.5, by a
factor of variation a / c of 0.45, 0.50 and 0.55 . After 28 days of curing, the
specimens were subjected to water absorption tests and resistance to
compression feature. Later, trace the pieces of 1:1.5:1.5, with factor w/c 0.45
were subjected to tensile strength tests in bending modulus, scanning electron
microscopy, abrasive wear, susceptibility to attack by sulfates and susceptibility
to the action of heat and rain. The results showed that the compressive
strength, modulus of elasticity and tensile strength in bending decreased as
PET content increased; The wear tests indicated that the abrasion parts, with
any of the concentrations used, can be used in situations with marked abrasion
effects; the pieces were resistant to attack by sulfates, regardless of the
presence of PET; When susceptible to the action of heat and rain, the piece
was analyzed mass variation and loss of strength in the order of 21%, however,
the leachate showed no risk of contamination of the soil.
