Enhancing Reol ogical Properties of liquid Asphalt

Abstract

The purpose of this study is to improve the specifications of cut back asphalt (S125) in order
to use in the treatment of holes, potholes and cracks of roads. Different methods were carried out
to enhance physical and mechanical properties and to get better construction behavior. These
treatments are:-
First: The vacuum distillation of S125 cut back asphalt was employed to remove oil, vacuum
gas oil and vacuum residue as a rapid curing. FTIR spectra of the four fractions of S125 were
recorded. It was observed a low penetration and high softening point for the vacuum residue.
Second: extraction method using ethanol as a solvent was employed to extract light component
that could be in the S125 cut back asphalt. The results indicated that the softening point was
highly increased and the penetration as well as ductility was decreased to minimized level.
Third: Some Polymers were used as cross linking agent such as melamine and phenol
formaldehyde resins.
Fourth: The unsaturated monomers were polymerized free radically to increase the
solidification of S125.
Fifth: The hydrated white cement was used as additive to the S125 cutback asphalt at different
ratios to improve the properties. This method was observed as a suitable and economic method,
and easy employed compared to others and the best rheological behaviors were given in this
method. Also the vacuum distillation method gave high improvements in rheological properties
for asphalt residue.