TL;DR: In this article, bitumen from seven Iranian bitumen production plants were tested and characterized according to the Superpave performance grading (PG) system and compared the results of this classification with the 13 performance grade binders required for specific climatic zones in Iran.
TL;DR: In this article, the 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.
TL;DR: The application of ESCA to the study of the structure, bonding and reactivity of coals, kerogens and bitumen samples has been examined, with particular reference to torbanite, vitrinite, kimmeridge kerogen, brown coal and Gilsonite pitch.
TL;DR: In this article, three different natural asphalts (Trinidad Lake Asphalt, Iranian gilsonite and American gilssonite) and styrene-butadiene-styrene (SBS) were used as additive in bitumen modification.
TL;DR: In this paper, Gilsonite, a natural asphalt, is used as a binder modifier to reduce the SBS content based on a series of rheological testing, and the results show that around 3-4 times more Gilsonitic is needed to replace 1% of SBS when the two modifiers are mixed in the same base binder depending on the Gilsonites/SBS ratio selected.