![]() State and local agencies often include them in their specifications. ![]() Typically, design catalogs contain a listing of common loading, environmental and service regimes and the corresponding recommended pavement structures. The simplest approach to HMA pavement structural design involves selecting a predetermined design from a catalog. The principal methods of structural design in use today are (from simplest to most complex) catalogs, empirical and mechanistic-empirical. Calculations are chiefly concerned with traffic loading stresses other environmentally related stresses (such as temperature) are accounted uset for in mix design asphalt binder selection. ![]() Structural design is mainly concerned with determining appropriate layer thickness and composition. Structural design for rehabilitation is covered in Maintenance & Rehabilitation. This section is focused on the structural design of new pavement. This includes the surface course as well as any underlying base or subbase layers. The goal of structural design is to determine the number, material composition and thickness of the different layers within a pavement structure required to accommodate a given loading regime. ![]()
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