In this paper, utilizing the bending Beam rheometer (BBR) test, low temperature rheological properties of asphalt binders which are modified by crumb rubber and gilsonite are investigated. For this purpose, the BBR test was performed on asphalt binder samples containing different extent of modif...detailed
In this research study, relative performance of a series of ethylene vinyl acetate (EVA) and gilsonite modified bitumens were evaluated in terms of three main distress modes of flexible pavement namely rutting, fatigue damage and low temperature cracking. Seven modified and unmodified bitumens w...detailed
Gilsonite is a natural fossil resource, similar to a petroleum asphalt high in asphaltenes. Asphaltenes are a class of organic compounds operationally defined based on their solubility in organic solvents, and as a result there is wide range of potential compositions and structures that can fit ...detailed
In this research, effects of the Iranian natural bitumen (gilsonite) on two types of asphalt binders produced in the country with the performance grades of PG58-22 and PG64-22 were studied according to superpave performance grading (PG) system. Results of conducted tests on the modified asphalt ...detailed
With the aim of improving high and low temperature performance, storage stability and compatibility of gilsonite modified asphalt, styrene butadiene rubber (SBR) was selected to achieve a further modification in this research. The effects of SBR on the conventional properties, rheological behavi...detailed