The first synthetic thermoplastic materials entered the market in the middle of the last century (1965).  The SBS-polymer name comes from “styrene- butadiene-styrene”.  This material has a chemical structure with elastic internal block.  This is why SBS-polymers are perfect to be mixed with bitumen.  Polybutadiene chain is formed as a result of such interaction.

Characteristic of these polymers is that polybutadiene and polystyrene are not stratified because they are connected to each other chemically.

What is the impact of SBS-polymers on the properties of bitumen?

Due to the presence of SBS-polymers, bitumen has the optimal flexibility and viscosity at low outside temperatures.

Implementing SBS-polymer as binding agents achieves following results:

  • better resistance to permanent mechanical stresses at rising temperatures.  This is achieved by high viscosity provided by the presence of polymer matrix;
  • high resistance to cracking at low temperature;
  • increased resistance to thermal and mechanical pressure, which is achieved by increasing stiffness;
  • increased wear resistance;
  • high resistance to aging and improved characteristics of binding agent fragility for porous asphalt.

Experts claim that using SBS-polymers is one of the most effective methods of bitumen modification today.  It allows obtaining pavement surfacing with improved technical and operational characteristics.