The composition of this dark, sticky substance primarily involves bitumen, a viscous liquid or semi-solid form of petroleum. This binder is combined with mineral aggregates such as crushed rock, gravel, and sand. The specific ratios and types of aggregates utilized influence the final properties of the resultant paving material, tailoring it for various applications and load-bearing requirements.
Its significance in modern infrastructure is undeniable, providing a durable, relatively cost-effective, and smooth surface for roadways, parking lots, and airport runways. Its resilience to weather and traffic, coupled with its ability to be recycled, contributes to its widespread adoption. Historically, naturally occurring deposits have been utilized for centuries, but contemporary production primarily relies on refining crude oil.
