What is Sasobit^®?

Sasobit^® is a mixture of long-chain hydrocarbons produced by the Fischer-Tropsch synthesis. They are alkanes with a chain length of 40 to 115 carbon atoms. The product is free from ash-forming materials (metals) and contains no hetero-atoms such as chlorine, sulphur, nitrogen and oxygen. As a result, Sasobit^® has excellent oxidation and ageing stability and may be stored indefinitely.

When road bitumen are admixed with Sasobit^®, their properties are markedly improved.

Adding just 3% weight to a 50/70 bitumen results in a large increase in R&B softening point to the level of that of 10/20 bitumen. The plasticity range (the difference between the R&B softening point and the Fraass breaking point) is considerably extended. The high R&B value is both a recognition and identification feature when the binder is extracted from the asphalt.

How Sasobit^® works

• Flow improvement
  Sasobit^® melts at about 100° C and significantly reduces the viscosity of the base bitumen. This offers advantages when it is added to hard and/or polymer-modified bitumen (e.g. PMB 25 and PMB 45) as well as highly modified polymer-bitumen.
  
• Low temperature sensitivity
  Sasobit^® increases the asphalt’s resistance to deformation throughout the operating temperature range.
  
• Low temperature properties
  Sasobit^® does not affect the low temperature properties of the asphalt, which are determined by the characteristics of the base bitumen.
  
• Mixing Sasobit^®
  Sasobit^® is completely soluble in bitumen at temperatures above 140° C.