The search for savings in the road project leads to employ as well as possible locally available materials. To reach this objective, it's sometimes necessary to use aggregates which do not respect the specifications of the road building owners. The use of these aggregates is also justified by the exhaustion of some of the traditional resources and by the increasing requirement regarding protection of environment. In France, actions are currently carried out to support their development in road bases and subbases, especially in the areas where problems of provisioning arise with acuity. The communication aims to present, through concrete examples, the method for qualification and promotion of such aggregates, recently conceived by the French road engineering committee. This method is based on two principal topics: the evaluation of the incurred risks by on site experimentation of innovating techniques, and the exploitation of the results to fix conditions of use and operational limits. For the covering abstract see ITRD E135448.
Abstract