SILVA, A. J. R.; SILVA, AMANDA JÉSSICA RODRIGUES; http://lattes.cnpq.br/0242378155578007; SILVA, Amanda Jéssica Rodrigues da.
Résumé:
Concern for the environment has become increasingly evident in recent years,
knowing that one of the main environmental problems found in urban centers is
associated with the urban heat island phenomenon, which presents as one of the great villains the
asphalt pavements precisely because they occupy a high surface area in cities and
have a dark color. In view of this environmental problem, a way to obtain
cooler paved surfaces under the incidence of solar radiation is increasing the albedo
of the same, through the coloring of asphalt surfaces, for this, it is suggested, the use of
materials that absorb less heat, in this case, the use of lighter surfaces, obtained
through the coloring of asphalt pavements, with lighter colors, which are capable of
actually reflect sunlight. Thus, the objective of this work is to investigate the potential of using
of HDPE residues for coloring asphalt mixtures, with a view to minimizing the
ICU phenomenon, due to the high reflectance of HDPE colors, in addition to verifying the behavior
rheological and mechanical analysis of modified asphalt mixtures with these residues. with a view to
To meet this objective, the research was structured in two main strands: first,
mechanical characterization of asphalt mixtures with the incorporation of HDPE, and second,
to verify the use of HDPE in the coating layer and its contribution to the reduction of
surface temperature and increased reflectivity compared to conventional pavements
dark in color. The mechanical results indicated the technical feasibility of incorporating the
HDPE the mixture, comparing the results obtained for the conventional mixtures, the
modified stood out in 7.14% in terms of tensile strength, 18.1% in terms of resilience,
14% in the deleterious behavior of water and 129% in permanent deformation. As for the use
of HDPE for coloring, this one proved to be satisfactory, the solar reflectance tests showed
that the colored asphalt mixtures stood out against the asphalt mixtures without the granulate
of HDPE. Field temperature tests showed that colored asphalt mixtures
reach temperatures up to 3.5 °C lower than mixtures without HDPE, thus showing the
possibility of using HDPE on the surfaces of asphalt mixtures as a collaborating agent
for ICU reduction.
