TITLE:
Physical and Thermo-Oxidative Characterization of Asphalt Modified with High Density Polyethylene and Recycled Engine Oil
AUTHORS:
Hélder Manguene, Antonino Squillace, Henriques Filimone, Herminio Muiambo
KEYWORDS:
Asphalt, Engine Oil, High-Density Polyethylene, Polymer Modified Asphalt
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.10 No.5,
May
31,
2022
ABSTRACT: Modification of
asphalt using polymers, oils and other additives has been an option to improve
asphalt pavement performance and extend its lifespan. The present work aims to
evaluate the influence of the addition of engine oil on the consistency and
thermal properties of HDPE-modified asphalt. For this study, compositions containing asphalt, engine oil and high-density polyethylene
(HDPE) were prepared, varying the concentration of engine oil by 2.5 wt%, 5
wt%, 7.5 wt% and 10 wt% and keeping the concentration of HDPE at 5 wt%. The
samples were characterized by conventional tests of penetration, softening
point and viscosity, aging in a Rotational Thin Film Oven (RTFO), Thermogravimetric
Analysis (TGA). According to the results, the addition of HDPE to virgin asphalt causes an increase in the
consistency of the virgin asphalt, which then decreases linearly as the
engine oil is added into the matrix. Conventional tests showed improvements in the
applicability of the asphalt in terms of resistance to cracks and permanent
deformation. TGA showed a slight increase in stability for the modified asphalt
samples at elevated temperatures. The RTFO showed mass
gain and loss for samples with and without engine oil, respectively.