Paving Grade bitumen

 

Paving Grade Bitumen

 

Paving grade bitumen or Asphalt concrete (commonly called Asphalt, Blacktop or pavement in North America, and tarmac, bitumen macadam, or rolled asphalt) is a composite material commonly used to surface roadsparking lotsairports, and the core of  embankment dams. Asphalt mixtures have been used in pavement construction since the beginning of the twentieth century. It consists of mineral aggregate bound together with asphalt, laid in layers, and compacted.

 

Paving Bitumen Grade C170 is used for paving and sealing. There are more paving bitumen grades of bitumen like C240 and C320. Bitumen is a viscous product obtained from the refining of crude oil. Bitumen is temperature sensitive, i.e., the material is fluid when heated allowing it to be pumped and sprayed. When cold, it is a plastic solid providing sufficient stiffness to retain aggregate and resist the forces of traffic. Flow or deformation properties are important when considering selection and application.

 

Other key characteristics of bitumen include:

 

 

The properties of bitumen for road making are specified in AS 2008; Residual Bitumen for Pavements. This Australian Standard classifies and specifies the properties of conventional pavement grades bitumen most widely used in Australia.

 

The following classes are most commonly used in sprayed sealing works in Australia:

 

 

paving grade bitumen

 

In New Zealand, the sealing grades bitumen is characterized by penetration grade and consists of:

 

 

This combination of properties makes bitumen an effective binder for sprayed seals.

 

Bitumen is generally supplied and applied at elevated temperatures, as this is usually the most economic form of binder delivery system. The technology involved is well developed, widely understood and supported by industry investment in equipment and other resources. Bitumen can also be applied as a bitumen emulsion or foamed bitumen, and these delivery systems have certain advantages and disadvantages compared to conventional bitumen delivery systems at more elevated temperatures.

paving grade
A Review of using Crumb Rubber in Reinforcement of Asphalt Pavement

 

Classification and Properties of Bitumen:

 

The properties of bitumen for road making are specified in AS 2008: Residual Bitumen for Pavements. This Australian Standard classifies and specifies the properties of conventional pavement grade bitumen most widely used in Australia.

 

The following classes are most commonly used in sprayed sealing works in Australia:

 

 

In New Zealand, the sealing grade bitumen is characterized by penetration grade and consists of:

 

 

Paving grade Bitumen

 

Standard Specification Of Paving Grade Bitumen

 

Standard Specification Of Australian Paving Grade C170