Asphalt ◉

: Later builders realized that adding hot tar to these stones reduced dust and wear, creating "tarmacadam" (tarmac).

: Phoenicians and Egyptians used natural bitumen (asphalt) to waterproof their ships , ensuring the wood survived long voyages. The Industrial Revolution

Asphalt is now one of the most recycled materials in the world. Old roads are ground up, reheated, and laid down again as "Recycled Asphalt Pavement" (RAP), making the "story" of a single piece of road one that can repeat for decades. One Bumpy Ride: The Evolution of Asphalt | by Ernie Smith asphalt

For thousands of years, asphalt was a "miracle" substance found naturally in places like and the Dead Sea .

: Builders moved from natural pits to refined petroleum asphalt, a byproduct of oil production that was more consistent and easier to transport. : Later builders realized that adding hot tar

: Invented "macadam" roads, which used layers of crushed stone to improve drainage.

: Today, asphalt is high-tech. Modern pavers use automation and thermal mapping to ensure the mix is laid at the perfect temperature (usually between 150°C and 170°C) to prevent cracks. The Future of the Road Old roads are ground up, reheated, and laid

: The Babylonians used it as a mortar for brick walls and as a sealant for their famed Hanging Gardens .