| dc.description.abstract | The use of plastic waste as an additive in asphalt mixtures has become an
alternative to improving pavement performance while reducing environmental impact.
This study aims to analyze the effect of adding Styrofoam and Polyethylene Terephthalate
(PET) as additives in asphalt mixtures on the characteristics of Asphalt Concrete Wearing
Course (AC-WC).
The research was conducted through experimental methods at the Highway
Engineering Laboratory, Faculty of Engineering, University of North Sumatera, and the
Laboratory of the National Road Implementation Agency, Medan. Styrofoam was added
at variations of 7%, 8%, and 9%, while PET was added at variations of 5%, 7%, and 10%.
The addition of Styrofoam and PET to the mixture was carried out using the wet method,
in which the plastic was incorporated into the hot asphalt and stirred until evenly blended.
The tests conducted included asphalt physical tests, Marshall tests, Wheel Tracking
Machine tests, and asphalt extraction tests.
The results showed that the addition of Styrofoam and PET increased the
softening point, specific gravity, and Marshall stability, while all other Marshall
parameters remained within specifications. In the Wheel Tracking test, the addition of
Styrofoam and PET resulted in increased deformation, indicating reduced rutting
resistance. The extraction test results confirmed that the asphalt content and aggregate
gradation met the requirements of SNI 8279:2016. The optimum modified asphalt
mixture was achieved at a combination of 9% Styrofoam + 10% PET | en_US |
