HMA Pavement Mix Type Selection Guide - FHWA West …
https://www.fhwa.dot.gov/publications/research/infrastructure/pavements/asphalt/HMA.pdf
Websurface course, intermediate or binder course, and a base course. The surface, binder, and base courses are typically different in composition and are placed in separate construction operations. The pavement layers for two common methods, full depth HMA and HMA over aggregate base, of HMA construction are shown in Figure 1. Surface Layer
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