FERREIRA JÚNIOR, K. R. R.; http://lattes.cnpq.br/3041422427950900; FERREIRA JÚNIOR, Kênyo Roberto Ramos.
Résumé:
Brazilian asphalt paving, as well as other countries, is constantly in need of
evaluation and renovation due to the deterioration of pavements, notably asphalt
pavements. The existing pathologies originate from the bad use of the road due
to large requests for which the pavement was not designed, deficiencies in the
constructive process execution, the use of materials with insufficient properties
to meet the need, and also of the current climatic conditions, among other causes.
The modification of asphalt binders is a practice that aims to increase permanent
deformation resistance, reduce cracks caused by fatigue or thermal variations,
as well as, consequently, improve the conditions of safety and comfort of the
highways and reduce costs with maintenance. Thus, this study aims to evaluate
the mechanical properties of asphalt mixtures produced with lignin-modified CAP
from eucalyptus at levels of 3 and 6%. The tensile strength presented a higher
value in the 3% eucalypt content in the binder and it was concluded that this
material has the most adequate stiffness to this parameter. There was increase
of the Resilience Module with the increase of the eucalyptus content in the
asphalt binder. As for tensile strength, there was a decrease in relation to the
pure binder, which shows that in this partially saturated condition the samples
with addition of eucalyptus contents present a lower aggregate-binder adhesion
more evident in the 3% sample; The Dynamic Modulus assay confirmed that
addition of eucalyptus contents in the blend gives an increase in stiffness. From
the realization of resilience modulus tests, modified Lottman, indirect traction and
dynamic modulus. It was observed that addition of the lignin to the binder
provided improvements in its properties.
