Asphalt
- Asphalt (AKA Bitumen) is a black, sticky, highly viscous fluid that is extracted from crude oil.
- It can be obtained from the oil through a process known as fractional distillation
- This process exploits the different melting points of chemicals.
- The substance is evaporated and then condensed in a different area.
- It is then refined by reacting it with oxygen.
- It is often used in pavings for roads in asphalt concrete or tarmac.
- Asphalt is used as a binder for the aggregate instead of cement.
- It is used as a road paving due to its toughness and crack resistance.
- Although its best feature for this application is that it does not generate as much noise as other concretes.
page revision: 3, last edited: 04 Oct 2011 06:58