SUB-NORMAL MATERIALS. ATTEMPT AT MAKING INSTRUCTIONS LESS SEVERE

MATERIAUX SUBNORMAUX - RECHERCHE D'UN ALLEGEMENT DES DIRECTIVES

THE AIM OF THIS STUDY IS TO SIMPLIFY THE DIRECTIVES CONCERNING ASPHALTIC CONCRETE AND GRAVEL-BITUMEN MIXTURES, WITH A VIEW TO ALLOWING THE USE OF LOCAL AGGREGATES NOT OR VERY LITTLE USED BECAUSE THEIR CHARACTERISTICS AGREE ONLY WITH THE MINIMUM REQUIREMENTS SPECIFIED IN THE DIRECTIVES. DURING 1975 AN INVENTORY OF BITUMINOUS MIXTURES NOT COMPLYING WITH THE DIRECTIVES WAS MADE IN THE VARIOUS REGIONS IN FRANCE. IN 1976, IT IS ENVISAGED: TO CONTINUE THE STUDY OF THE BEHAVIOUR OF THE BITUMINOUS MIXTURES INVENTORIED, AND TO DRAFT PROPOSED EXCEPTIONS.