Composite pavements

Combination HMA and PCC pavements. Occasionally, they are initially constructed as composite pavements, but more frequently they are the result of pavement rehabilitation (e.g., HMA overlay of PCC pavement). Officially, the FHWA “composite pavement” category is defined as a “mixed bituminous or bituminous penetration roadway” of more than 25 mm (1 inch) of compacted material on a rigid base (from the FHWA).