Asphalt plays the role of envelope and bonding in asphalt gable, and is exposed to a range
of changes that start from the stage of production of asphalt mosses to the stage of
investment under the influence of traffic loads and weather factors. The
aim of this
research is to investigate the possibility of using polypropylene polymer to modify the
properties of the asphalt binder and to increase its resistance to high temperatures and
different climatic conditions by modifying the asphalt by adding polypropylene by (1, 2, 3,
4, 6, 8%) And perform traditional tests on modified asphalt samples . Using Thin film oven
test RTFOT test to perform the short-term Aging on normal and modified asphalt samples,
heat loss, residual Penetration and aging index, And conduct a structural composition test
to determine asphalt compounds. The results of the study showed that the values of
Penetration tend to decrease with the increase of the percentage of addition while the
degree of Softening point. The results showed increased resistance of asphalt modified to
the thermal conditions. The optimum percentage of polypropylene is 3% Loss on heat at
the lowest level.
