Evaluation of pyrolisis polypropylene modified asphalt paving materials

Abstract EN

The main objective of this research study is to investigate the potential use of pyrolisis polypropylene as modifiers in hot mix asphalt paving mixtures.

Seven different blends including conventional mix were subjected to binder testing such as rheological tests, as well as to some other tests related to the homogeneity of the system.

Optimum asphalt content was obtained by Marshall method and used in all the modified mixes.

The engineering properties, including Marshall stability and indirect tensile strength were determined.

Research results indicate that modified binders showed higher softening point, keeping the vales of ductility at minimum range of specification of (100cm), and caused a reduction in percent loss of weight due to heat and air (i.e.

increase durability of original asphalt).

The results indicated that the inclusion of pyrolisis polypropylene with asphaltic concrete mixtures gave a quite satisfactory result in terms of stability and other Marshall properties, and increase in indirect tensile strength).