Project title: Better Type of Bituminous Concrete for Wearing Courses

File: C002.1

Problem:
In the case of wearing courses, there are no recognised methods for determining, the most appropriate type of bituminous surface for given environmental and pavement structure conditions and traffic density. The choice is often subjective, depending on the designer's experience.

Objectives:
The object of the study is to establish a certain number of simple, empirical rules concerning the performance of various coatings, based on detailed observations. These rules should allow a surer choice of the appropriate type of surface treatment and thus contribute to the design of more durable pavements.

Methodology:
The study analyses a certain number of road sections, for a total length of 200 kilometres, noting the age of the surface, the traffic density and components, the type of asphalt and the geographic location, with a special focus on central Quebec. The study is also limited to the conventional type of wearing courses used in Québec and known as MB4 and MB5, recycled or non-recycled, and Skip Mix. The comparison focuses on resistance to cracking, rutting and slipperiness.

General information:

Modality:
Private company