THE EFFECT OF POLYETHYLENE TEREPHTHALATE (PET) ON THE MARSHALL PROPERTIES OF RECLAIMED ASPHALT

Oluwafemi D. Adams, Fisayo E. Elufowoju, Hussein Mohammed

Abstract


This study evaluated the effect of polyethylene terephthalate (PET) on the Marshall properties of reclaimed asphalt with a view to evaluating its suitability as an additive in reclaimed asphalt. The reclaimed asphalt used for this study was obtained from an identified reclaimed asphalt stockpile along Ife-Sekona Road, Osun State, Nigeria and was reduced to manageable sizes to ensure ease of handling. The PET was sourced from dump sites within Obafemi Awolowo University, Ile-Ife. It was sorted, cleaned, and shredded by mechanical means into pieces ranging from 0.6 – 2.36mm at a recycling factory in Ido Osun, Osogbo. The PET was introduced into reclaimed asphalt at an increasing rate of 0.5%,1.0%, 1.5% and 2.0% of the sample. The samples were subjected to Marshall stability test. The stability, flow, specific gravity, voids filled with bitumen (VFB), air voids (VA) and voids in the mineral aggregate (VMA) were determined. The results of Marshall stability, flow, bulk density, air voids (VA), voids filled in bitumen (VFB), and voids in mineral aggregate (VMA) of the reclaimed asphalt sample at 0% PET were 17.8kN, 3.6mm, 2.57gm/cm3, 3.74%, 5.04%, 25.80%, respectively, while the values at 1.0% PET content were 20.2kN, 3.8%, 2.5gm/cm3, 3.1%, 5.15% and 39.80% respectively. The result showed that the Marshall properties of the reclaimed asphalt were improved by PET and yielded an optimum PET content of 1.0 %.

 

KEYWORDS: Polyethylene Terephthalate (PET), Reclaimed Asphalt, Marshall Stability, Air Voids, Voids in Mineral Aggregate 

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References


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