Honors College Theses

Publication Date



Civil Engineering (B.S.)

Document Type and Release Option

Thesis (open access)

Faculty Mentor

Junan Shen


As asphalt ages, its resistance to shear diminishes due to a change in composition, resulting in the need for repaving of roads. Current additives to asphalt binder focus on increasing the strength of the binder, but do nothing to prevent the ageing of the asphalt binder. Lignin is a biological additive that is known for its resistance to ultraviolet radiation. This research aims to study Lignin as an asphalt additive, which exhibits properties that can increase the resistance of degradation due to aging, as well as increasing the strength of the asphalt binder. This was done through the comparison of rheological properties of aged asphalt binders with varying dosages of Lignin, as measured using a Dynamic Shear Rheometer.