Bitumen pavement is the liquid binder which holds asphalt together. These pavements are developed in various layers, for example, base course, cover course layer and Bituminous Solid Layer. These layers are made of various materials and give various capacities to the bituminous pavement.
Bituminous Base Course
Base course layer in a bituminous asphalt comprises of mineral aggregates such as rock, stones and sands reinforced together with bituminous materials. This layer is utilized as the establishment on which surface course is put.
Cover course layer
Cover course layer is a middle layer between base course and surface layer. It is the first layer in case of two-layer bituminous resurfacing. Bituminous cover course is made of bituminous mixture. It is also called as leveling course.
Bituminous Solid Layer
Bituminous solid layer is a mixture of aggregates constantly graded from large size to small sizes (normally under 25mm to 0.075mm aggregates). Adequate bitumen is added to the mixture with the goal that the compacted solid mix viably impervious and has acceptable dissipative and elastic properties.
Bitumen paving costs far less than concrete paving. It also provides a little better safety of the vehicle against snow and skidding.