Asphalt, like concrete, is made up of stone (aggregate), sand, and additives. Unlike concrete, asphalt adds liquid asphalt (petroleum) as a binding substance. This binding material is what allows asphalt to be hard enough to handle heavy traffic as well as flexible enough to resist cracking due to weather elements.
Asphalt is also good for the environment because it’s highly recyclable. Whenever asphalt paved areas are destroyed; those pieces can then be recycled back into new asphalt. More than 80 million tons of asphalt is reclaimed and most of it is recycled back into new asphalt in the United States every year. Another item that can be recycled and added to asphalt is tires. The use of rubber tires isn’t just good for the environment but it’s also good for noise pollution. Asphalt is “quiet” when driving over it compared to concrete because it absorbs road noise; but it is even quieter when recycled tires are added to the composition. Rubberized asphalt can cut traffic noise pollution down by 25%.