Performance of gravel aggregates in Superpave mixes with 100/95 angularity

The current aggregate requirement for aggregate angularity that the NYSDOT requires for their Superpave Hot Mix Asphalt (HMA) is 100/98. With this requirement, many of the gravel quarries in New York State cannot meet that specification. As a result, quarries that are further away from the job site have to transport the aggregates which in turn increases the cost of construction. This paper investigates a multitude of test methods to determine whether the NYSDOT can further lower their Superpave aggregate angularity requirement. Also, this paper delves into "grade bumping".