Abstract:
Waste polyvinylchloride (PVC) pipes were reused in the modification of commercially available bitumen. Waste PVC/ bitumen blends were prepared by melt-mixing method. Rheological characteristics of the neat bitumen and bitumen blends samples were investigated. The rheological properties were determined using an ARES- Rheometer (Rheometric Scientific, Co.) under nitrogen atmosphere in parallel plate geometry with diameter 25 mm. The measurements were performed over a wide range of temperatures ranged from -10°C to 60°C and frequencies from 100 to 0.1 radians per second. Improvement in rheological properties such as shear compliance, torque and complex viscosity were observed by the incorporation of the waste PVC into bitumen. The flow activation energy for neat bitumen and bitumen blends are calculated from the melt viscosity by using the rheometric software and it is found to be 1.42 ´105, 1.5 ´105, 1.58 ´105 and 1.7 ´105 J/mol.K for neat bitumen, bitumen-5%PVC, bitumen-7%PVC and bitumen-11%PVC, respectively
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