Pavement engineering is undergoing significant changes in the options available for materials, design, and rehabilitation. Recent innovations in pavement materials include using polymer-modified binders, Superpave binder specifications and asphalt mixture designs, and utilization of recycled asphalt, fiber or polymer stabilization of soils and marginal materials, which has become necessary due to depleting supplies of materials that meet standard requirements. Recent significant changes for pavement design include the movement toward mechanistic design procedures that can be “calibrated” by empirical pavement testing, utilization of pavement drainage layers, and designs intended to serve new traffic, such as the Airbus A380. Pavement rehabilitation techniques are also changing as a result of improvements in equipment technology. Examples for asphalt pavements include asphalt milling, microsurfacing, and slurry seal applications. Examples for concrete pavements include rubblization, diamond grinding concrete surfaces, and retrofitting dowels.
CA offers broad expertise in pavement engineering to include materials, design, construction, rehabilitation, and management. CA personnel have been involved with projects in all these technical areas, for both roadway and airfield pavement structures.