Evaluation of Pyrolisis Polypropylene Modified Asphalt Paving Materials

Abstract

AbstractThe main objective of this research study is to investigate the potential useof pyrolisis polypropylene as modifiers in hot mix asphalt paving mixtures. Sevendifferent blends including conventional mix were subjected to binder testing suchas rheological tests, as well as to some other tests related to the homogeneity ofthe system.Optimum asphalt content was obtained by Marshall method and used in allthe modified mixes. The engineering properties, including Marshall stability andindirect tensile strength were determined. Research results indicate that modifiedbinders showed higher softening point, keeping the vales of ductility at minimumrange of specification of (100cm), and caused a reduction in percent loss ofweight due to heat and air (i.e. increase durability of original asphalt). The resultsindicated that the inclusion of pyrolisis polypropylene with asphaltic concretemixtures gave a quite satisfactory result in terms of stability and other Marshallproperties, and increase in indirect tensile strength).Keywords: polypropylene, polymers, asphalt modifiers, Asphalt binders