Pavement

The fluid characteristics of a PMB are very different from those of conventional bitumen. Increases in viscosity and binder cohesion (internal strength) as a result of polymer modification are usually accompanied by a decrease in binder wetting ability (adhesion) and therefore a reduction in the capacity for initial adhesion to the aggregate particle.

Particular attention is required to all aspects of field procedures that influence adhesion, including:

• use of adhesion agent
• aggregate condition and precoating
• cutting back
• ambient conditions and preparation of pavements
• spraying and covering of binder.