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

Which material is commonly 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: Learn about the base layer. The base layer is the layer that provides support to the surface layer and helps distribute the load.
Step 4: Know what materials can be used for the base layer. Common materials include granular materials like crushed stone or gravel.
Step 5: Understand the purpose of using granular material. It helps provide support for the pavement and allows for proper drainage of water.

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