Asphalt compositions and methods of forming the same

A method of forming an asphalt composition, said method comprising the steps of:

• providing asphalt;
• providing a non-epoxidized oil chosen from flux oils, bio oils, recycled motor oils, liquid plasticizers, and combinations thereof,
• providing a polyolefin having a weight average molecular weight (Mw) of from about 1,000 to about 20,000 g/mol, an optional acid number of from about 10 to about 50 mg KOH/g, an optional saponification number of from about 10 to about 100 mg KOH/g, and a density of from about 0.92 to about 1 g/cm3, and
• combining the asphalt, the non-epoxidized oil, and the polyolefin to form the asphalt composition,
• wherein the asphalt composition comprises the asphalt in an amount of from about 85 to about 97 weight percent, based on a total weight of the composition, the non-epoxidized oil in an amount of from about 2 to about 10 weight percent, based on a total weight of the composition to improve thermal cracking resistance, and the polyolefin in an amount of from about 1 to about 5 weight percent, based on a total weight of the composition to improve deformation resistance;
• wherein the asphalt composition has a performance grade of PG (52 to 88) and (−22 to −40), wherein (52 to 88) is an average seven day maximum pavement design temperature in degrees Celsius and represents deformation resistance and (−22 to −40) is an average one day minimum pavement design temperature in degrees Celsius and represents thermal cracking resistance, each as determined using AASHTO M320.