OLIVEIRA NETO, C. R.; OLIVEIRA NETO, Carlos Roberto de.
Resumo:
Civil construction is the main industry that drives the economy of a country. Thus,
as engineering evolves, society gains in infrastructure, job creation, quality of life,
technological innovations. On the other hand, it is one of the sectors where most
raw material is consumed, in addition to holding the title of the factory that
consumes the most inputs from society. Bases on this reality, the search for
sustainable solutions has become frequent in the civil construction sector. The
addition of polymers in the construction processes is one of the main fronts to
combat this statistic. These polymers increase in mortars, concretes and other
inputs, important properties that improve their performance and make processes
more effective. Recycled polymers have been growing in application in civil
construction precisely because this interaction brings gains in propertiesn in
addition to having an important environmental bias. This study aims to analyze
the effect of adding ethylene polytherephthalate (PET) on the pysichal and
mechanical properties of mortars. Characterization tests were carried out on
cementitious binder, fine aggregate and PET. After the trace definition specimens
with dimensions of 5 x 10 cm were molded with PET contents in the values of
5%, 10%, 15%, 20% and 25%. Resistance to axial compression, resistance to
attack by sulphates and resistance to tensile adhesion were determined. For the
hardened state, the addition of this aggregate did not bring significant gains in
the tests of compression and tensile adhesion, since relation to attack by sulfates,
the polymer aggregate behaved in a negative way. However, the polymer brings
important gains in the fresh state of the mortar, increasing its water absorption,
workability, consistency, mass density.
