Which material is typically used as a base layer in flexible pavement design?

Which material is typically used as a base layer in flexible pavement design?

Step 1: Understand what flexible pavement is. It is a type of road surface that can bend and flex under load.
Step 2: Identify the layers of flexible pavement. There are usually multiple layers, including the surface layer, base layer, and subgrade.
Step 3: Focus on the base layer. This layer is crucial because it supports the surface layer and helps distribute the weight of vehicles.
Step 4: Learn about the materials used in the base layer. Granular material, which consists of small stones and sand, is commonly used.
Step 5: Understand why granular material is used. It provides good support and helps spread out the weight of traffic over a larger area.

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