Anti Stripping Agents /Additives = Definition, Functioning and Explanation

Antistripping Agents are chemicals, whose primary function is to increase the adhesion between the binder and aggregate. The main goal of anti-stripping additives, is to increase the strength and durability of the adhesion between aggregate and bituminous binders.

The adhesion promoter works in 3 ways.

• They reduce the surface tension of binder.
• They change the charge of the aggregate.
• They act as strong bridge between aggregate and binder.

The amine based anti stripping products are made of 2 parts:

• The amine head has an affinity for the aggregate and strongly sticks with it.
• The 2nd part, is a hydrocarbon tail, which bonds with the binder ( Same family).

This results in a bridging – bonding , adhesion promoting effect.