Asphalt concrete

What is Asphalt Concrete?

Asphalt concrete is a special material used to make roads smooth and strong. It is often called asphalt, blacktop, or pavement. People use it for roads, parking lots, airports, and even some dams.

Asphalt concrete is made from tiny pieces of rock mixed with a sticky substance called bitumen. This mixture is laid down in layers and pressed to make a firm surface. It has been used for building roads since the 1800s.

A Long History

People have used natural asphalt for thousands of years. Ancient places like Mesopotamia, Egypt, Greece, and Rome used it to make things waterproof and strong roads. In 1824, France began using asphalt to cover stones for roads. Later, special mixes were created to make even better road surfaces.

How It’s Made and Used

Asphalt concrete can be made in different ways. One common way is called hot-mix asphalt. The materials are heated and mixed together while hot. This type is used for busy roads, racetracks, and airfields. There are also warm-mix and cold-mix types, which use special tricks to save energy or fix small road problems.

Asphalt roads can be quiet and help water drain away. They are used around the world because they are strong and can last a long time when cared for properly.