Incidencia del empleo de polímeros como modificadores del asfalto
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Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista, Editorial Lasallista
Abstract
Introduction. The use of modified
asphalts with polymers in the
construction of roads is a frequent
practice at an international level but
still limited in Ecuador. However, due
to the short durability of our asphalt
pavements, mainly caused by premature
fatigue cracks or blocks, the potential of
these products should be considered.
Objective. Evaluate the behavior of the
asphalt coming from the Esmeraldas
Refinery when it is mixed with three
commercial polymers, by means of the
tests required for the classification of
viscosity and by Superpave performance
grades, including a rheological analysis
using master curves and Black
diagrams. Materials and methods.
The polymers used were: SBS, Elvaloy
and rubber tires, dosed to meet certain
quality requirements determined by
experimental methods, according to
ASTM regulations. Results. As main
results the high degree of temperature
increased to 76 by modifying the PG 64-
28 asphalt with the different polymers,
maintaining the low degree on those
modified with Elvaloy and rubber in -28,
while for the SBS it increased to -22.
Regarding to intermediate temperatures,
the critical temperature to fatigue didn’t
have much variation when the different
modifiers were applied. This situation
was corroborated with Black diagrams.
Conclusions. Trying to solve the poor
cracking performance of the Ecuadorian
asphalt by mixing it with the polymers
studied would not be the most effective
solution, although the improvement of
the performance to plastic deformations
is notorious.
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Keywords
Corporación Universitaria Lasallista
Citation
Revista Lasallista de Investigación Vol. 15 No 2 2018