Bitumen Emulsion

Binder & Adhesives

Bitumen is used as a binder in road construction and in protective coatings and adhesives used in the construction industry.

In the most common processes, the bitumen is heated to 100-200c until fluid enough to mix with aggregate. The hot mixed materials must themselves be stored, transported and used hot to maintain their workability. The final strength of roadway is developed as the mixture cools. Alternatively, the bitumen is diluted with petroleum solvents like kerosene until fluid and the final strength of the material only develops when the solvent evaporates. 

ChemBit range of Bitumen emulsions provide an alternative approach in which the bitumen is liquefied by dispersing in water. Emulsions can be used with cold and wet aggregates, the final strenght of the road material develops as the emulsions sets - reverts to continuous bitumen phase and water is lost

In modern era, Many road construction applications. emulsions provide a safer and environmentally friendlier system than hot bitumen since the risk of fire, burns and emissions are avoided and the processes use less energy.

Type of Emulsifier
  • Rapid Setting Emulsifer  - Set quicky in contact with clean aggregatates of low surface area such as the chippings used in
    chipseals (Surface dressings)

  • Medium Setting Emulsifier - Set sufficiently less quickly that they can be mixed with aggregates of low surface area such as those used in
    open graded mixes.

  • Slow Setting Emulsifer - Will mix with aggregates slowly and used in high surface area.

All aspects of emulsion formulation can affect its classification including emulsifer type and concentration, choice and concentration of acids or base used to adjust pH, and the grade and source of the bitumen used.

Typical Emulsifier Use Level
Typical Emulsifier Use Level