Conference on highway engineering in Africa Addis Ababa April 1974: surface courses of bituminous materials

Abstract

The surfacing plays a special role in the pavement because it is directly subjected to vehicle movement. Therefore it must - offer a suitable surface for vehicle movement that is safe and comfortable (properties of skid-resistance and riding quality) ; resist the forces imposed by traffic (vertical and horizontal forces) ; resist the attack of agencies other than traffic (sun, oxygen, water, temperature) Two principle techniques are used in the construction of surface courses ; surface dressings ; premixed bituminous materials.