A course of hot mix asphalt of variable thickness used to eliminate irregularities in the contour of an existing surface prior to placing the subsequent course. An application of asphalt primer to an absorbent surface. It is used to prepare an untreated base for an asphalt surface. The prime penetrates or is mixed into the surface of the base and plugs the voids, hardens the top and helps bind it to the overlying asphalt course. A relatively thin application of asphalt binder applied to an existing asphalt concrete or PCC surface at a prescribed rate.
Asphalt emulsion diluted with water is the preferred type.
It is used to form a bond between an existing surface and the overlying course. Asphaltenes The high molecular weight hydrocarbon fraction precipitated from asphalt by a designated paraffinic naphtha solvent at a specified solvent-asphalt ratio. Automatic Cycling Control A control system in which the opening and closing of the weigh hopper discharge gate, the bituminous discharge valve, and the pugmill discharge gate are actuated by means of self-acting mechanical or electrical machinery without any intermediate manual control. The system includes preset timing devices to control the desired periods of dry and wet mixing cycles. Automatic Dryer Control A system that automatically maintains the temperature of aggregates discharged from the dryer within a preset range.