LUCENA, F. M. S.; http://lattes.cnpq.br/4227665166295276; LUCENA, Fllávio Marcell dos Santos.
Résumé:
The introduction of modifiers for asphalt binders and asphalt mixtures, in order to avoid the
appearance of pavement defects, improves the quality of the asphalt binder and therefore
provides a longer service life for the pavement. The modification of asphalt binders is a practice
that aims to increase the resistance to permanent deformations, such as cracks caused by fatigue
or thermal variations, as well as, consequently, improve road safety and comfort conditions and
reduce maintenance costs. The objective of this work was to study the modification of the
asphaltic binder 50/70 by two types of lignin, from different species, hardwood (Pinus) and
conifers (Eucalyptus), at levels of 3%, 6% and 9%. In this research the RTFO aging procedure
and the FTIR chemical test were performed. The results indicated that incorporation of lignin
to the CAP 50/70 can reduce the aging process by reducing the binder oxidation process, but it
is necessary to perform other chemical tests that attest to the indications verified in this work.
In this way, the use of this natural polymer can be a viable alternative for the exploitation of the
lignin surplus of the paper and cellulose industries, avoiding the inadequate disposal in the
environment, as well as economically to be able to substitute a percentage by weight of the
binder used in the paving, generating an extra source of income for the pulp and paper producing
industries, as well as being used in place of high-cost synthetic polymers.
