Abstract: A cracking resistant asphalt binder includes a high viscosity vacuum tower bottoms material having a vacuum viscosity greater than about 50,000 P at about 60° C., greater than about 10.0 weight percent of a low viscosity vacuum tower bottoms material, and a biomaterial comprising greater than about 80.0 weight percent bio-resin. The combination of the low viscosity vacuum tower bottoms material and the biomaterial imparts desirable properties to the cracking resistant asphalt binder. Related cracking resistant asphalt binder and methods are also disclosed.

Abstract: A method of forming a cracking resistant asphalt binder includes providing a high viscosity vacuum tower bottoms material having a vacuum viscosity greater than about 60,000 P at about 60° C. and a high temperature compliance higher than 85° C., and mixing at least one of a heavy vacuum gas oil or a biomaterial with high viscosity vacuum tower bottoms material to form a cracking resistant asphalt binder having a performance grade of PG 64-22 and a ?Tc greater than ?5° C. after PAV aging for 40 hours. Related cracking resistant asphalt binders and methods are also disclosed.

Abstract: A method of forming a cracking resistant asphalt binder using at least one hard asphalt includes providing at least one hard asphalt having a penetration between 0 dmm and 10 dmm at about 25° C., a softening point between about 65.6° C. and about 104.4° C., a high temperature compliance of at least about 85° C., and a low temperature compliance greater than about ?12° C., and mixing the at least one hard asphalt with a base asphalt material to form a cracking resistant asphalt binder having a performance grade of PG 64-22 and a ?Tc greater than ?5° C. after PAV aging for 40 hours, the cracking resistant asphalt binder comprising at least about 5.0 weight percent of the at least one hard asphalt by weight of the base asphalt material. Related cracking resistant asphalt binders and methods are also disclosed.