What is the primary material used for asphalt pavement?

The primary material used for asphalt pavement is bitumen mixed with aggregates. This combination is essential because bitumen acts as a binding agent that holds the aggregates together, providing a strong and durable surface for roadways. The aggregates, which can include sand, gravel, and crushed stone, give structural stability and help to distribute loads effectively.

Asphalt pavements are widely used in road construction due to their resilience, flexibility, and ability to withstand varying weather conditions and heavy traffic loads. The mixture of bitumen and aggregates can be tailored to achieve different performance characteristics, making it a versatile choice for a variety of pavement applications. This mixture is heated to make it workable during installation, after which it cools and solidifies, forming a smooth and tough surface suitable for vehicles.