Source Properties Aggregate characteristics that must follow certain criteria to satisfy a Superpave mix design. Specified values are established by local agencies. They include Toughness, Soundness, and Deleterious Materials. Spalling The breaking or chipping of a PCC pavement at joints, cracks, or edges, usually resulting in fragments with featheredges. Stability The ability of an asphalt paving mixture to resist deformation from imposed loads.
Stability is dependent upon both internal friction and cohesion.
Stationary Plants Asphalt plants that are so constructed that moving them is not considered economically feasible. A compactor having single or double cylindrical steel rolls that apply compactive effort with weight and vibration. The amount of compactive force is adjusted by changing the frequency and amplitude of vibration. Stoke A unit of kinematic viscosity equal to the viscosity of a fluid in poises divided by the density of the fluid in grams per cubic centimeter. A HMA overlay constructed for the purpose of increasing the structural value and ride quality of the pavement system.