THE ADHESION OF ROAD AGGREGATES - THE QUARRY OWNER FACED WITH THE PROBLEM OF PRE-TREATMENT

L'ADHESIVITE DES GRANULATS ROUTIERS - LE CARRIER FACE AU PROBLEME DE PRETRAITEMENT.

DURING THE COURSE OF THE SEMINAR ON TRAFFIC PROBLEMS AT THE EXPOMAT 74 EXHIBITION ON 15TH MAY 1974, THE AUTHOR DESCRIBED A SPECIAL COATING PROCESS. IN THE PRODUCTION OF A GRAVEL BITUMEN, COATING OF THE LARGER STONES IS MORE DIFFICULT THAN THAT OF THE FINER STONES, UNLESS THE MIXING PROCESS IS PROLONGED TO IMPROVE THE RESULTS. THE SPECIAL PRE-TREATMENT PROCESS WHICH IS SUGGESTED AS A REMEDY, INVOLVES FIRST TREATING THE GRAINS LARGER THAN TWO TO FOUR MM, THEN PROGRESSIVELY INTRODUCING THE SAND BETWEEN 0/2 OR 0/4 INTO THE DISCONTINUOUS MIXING PLANT. THE AUTHOR DEALS WITH MATERIALS FOR SURFACE DRESSINGS AND STRESSES THE VARIATIONS IN THE EFFECTIVENESS OF ADHESION PROMOTING AGENTS OVER A PERIOD OF TIME, THEN MAKES A COMPARISON BETWEEN THE COSTS OF VARIOUS TREATMENTS: LACQUER; HOT PRE-COATED CHIPPINGS WITH A BINDER DOSAGE OF 2 - 2.5%; PRE-COATED MATERIAL WITH A DOSAGE OF 0.5% OF BINDER AND 0.2% OF ADHESION PROMOTING AGENT; PRE-TREATMENT WITH ADHESION AGENTS CONTAINING WATER. A SUMMARY IS PRESENTED OF THE ADVANTAGES AND DISADVANTAGES OF THE PRE-TREATMENT PROCEDURE.

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01296733
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Nov 21 2010 6:02AM