A STUDY OF BITUMINOUS MIXTURES USED FOR ROAD MAINTENANCE

ENROBES D'ENTRETIEN ETUDES

THIS RESEARCH CONCERNS THE DEVELOPMENT OF BITUMINOUS MIXTURES FOR THE MAINTENANCE OF STRENGTHENED ROADS BY MEANS OF A THIN LAYER. IN 1979 IT IS ENVISAGED: - TO CONTINUE TO SUMMARIZE THE RESULTS ACQUIRED IN THE LABORATORY AND ON EXPERIMENTAL SECTIONS SINCE THE BEGINNING OF THE RESEARCH; - TO CONTINUE TO STUDY WEARING COURSES OF "THE BASECOURSE-WEARING COURSE" TYPE; - TO GIVE TECHNICAL ASSISTANCE TO THE NETWORK OF REGIONAL LABORATORIES FOLLOWING THE PUBLICATION IN 1978 OF A DRAFT INFORMATION NOTE ON THIN-LAYER MAINTENANCE BITUMINOUS MIXTURES; - TO COMPLETE THE FILE: "SPECIAL BITUMINOUS MIXTURES" WITH RESULTS OF FATIGUE TESTS, STUDIES OF MODULUS, PROLONGED IMMERSION, GYRATORY COMPACTION AND TRACKING; - TO BE INVOLVED IN A NEW EXPERIMENT: THE TAPIGRATAN, A BITUMINOUS MIXTURE SPRINKLED DURING SPREADING, WHICH SHOULD SOLVE THE IMPERVIOUSNESS-ROUGHNESS PROBLEM FOR THIN LAYER BITUMINOUS MIXTURES. PRECOATED CHIPPINGS MIXTURES.