AC Bitumen

By definition, bitumen is a mixture of hydrocarbons obtained from refining crude oil. This material is thermoplastic and its hardness depends on temperature. The relationship between temperature and hardness of bitumen depends on the source of crude oil and refining method. Bitumen is completely soluble in carbon disulfide (CS2) and has the ability to stick and be waterproof. It is mainly composed of hydrocarbons and is usually made up of about 80% carbon and 15% hydrogen, with the balance being oxygen, nitrogen and other trace elements. Penetration-grade bitumen is commonly used in road surfaces and minor industrial applications. Permeability determines the hardness of bitumen by measuring the depth that a standard needle-load penetrates vertically in 5 seconds, in an example of Bitumen stored at 25 degrees Celsius
Viscosity grade bitumen asphalt can be used over original asphalt that is grades AC (asphalt cement) or old residual grade AR (aged residual).
AC grades showed a viscosity at 60°C, in fact the number after AC at 60°C heat showed an absolute viscosity of 0.01. For example, AC-5 means that bituminous asphalt cement has a viscosity of 500 shells at 60 degrees Celsius. The number after AR showed in the heat at 60 degrees Celsius. Common asphalt cement grades are AC-2.5, AC-5, AC-10, AC-20, AC-30, AC-40. AC 20 is a designed bituminous asphalt that is mostly
It is used in hot climates because of its high viscosity