ABSTRACT
Flexible/asphalt pavements are generally made up of layers. Each layer is made up of a combination of materials-generally aggregate, binder, and any other additive. The process of designing the optimum combination of materials is called mix design. Once the structural properties of each layer are known (or estimated accurately), the optimum structure of the pavement is determined, that is, the thickness of each layer is determined. This process is called structural design, which also involves structural analysis-determination of stresses, strains, and deformations in different layers.
