Abstract
Abstract
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).
Keywords: polypropylene, polymers, asphalt modifiers, Asphalt binders
