Evaluation of the engineering properties of asphaltic concrete composite produced from recycled asphalt pavement and polyethylene plastic
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Abstract
Description
This study investigated the suitability of recycled asphalt pavement and polyethylene wastes
as coarse aggregate in asphaltic concrete by evaluating the impact of the use of polyethylene
polymer wastes and recycled asphalt pavement composite as aggregates on the physical
and mechanical properties of the asphaltic concrete. The physical characteristics of the
aggregate and bitumen were determined using relevant parametric tests. Recycled asphalt
pavement was used to make asphaltic concrete samples using LDPE at 5%, 10%, 15%,
RAP at 5% and HDPE at 5%, 10%, 15%, and a mixture of LDPE + HDPE at 5+5%, 7.5
+7.5% and 10+10% RAP at 5% as additives. Marshall Stability test was conducted to
assess the mechanical strength of the asphaltic concrete, and the results included information
on the aggregate’s stability, flow, density, voids filled with bitumen, voids filled with air,
and voids in mineral aggregate. In addition, the surface and crystal structure of the aggregates
was studied by carrying out a microscopic examination with a Scanning Electron
Microscope (SEM) and X-Ray diffraction (XRD). The results obtained from this study demonstrated
that RAP, HDPE & LDPE are viable conventional aggregate substitute for asphalt
concrete production.
Keywords
TA Engineering (General). Civil engineering (General)