PRESENT TECHNIQUES OF DENSE OR SEMI-DENSE PRE-COATED MIXTURES PREPARED WITH CATIONIC EMULSIONS

LA TECNICA ACTUAL DE LOS PREMEZCLADOS DENSOS Y SEMIDENSOS PREPARADOS CON EMULSIONES CATIONICAS.

THE TECHNOLOGY OF DENSE BITUMINOUS MIXES WITH EMULSION IS EXTENSIVELY USED IN BRAZIL, IN ARGENTINA AND IN MEXICO. THREE METHODS FOR PREPARING THESE MIXES ARE OUTLINED: (A) EMULSION RM-1C; WITH A BITUMINOUS SOLVENT AND CR-2, THE EMULSIFYING AGENT BEING AN AMINE. THESE MIXES ARE EMPLOYED IN SURFACINGS OR LOAD BEARING BITUMINOUS COURSES. THE GRADING CURVES ARE BASED ON BRITISH STANDARDS (BS) WITH 20 - 25% LESS THAN 2 MM, THE COMPACTION TAKES PLACE BETWEEN 12 AND 48 HOURS AFTER SPREADING, THE PROPORTION OF VOIDS IS 6% OF THAT OF THE FILLER WITH A MINIMUM OF 3%, THE MARSHALL STRENGTH EXCEEDS 500 KG. (B) EMULSION RR-1C WITH PRE-TREATMENT. IN THIS CASE, THE PROPORTION OF FILLER CAN REACH 10%, WHICH ALLOWS THE PREPARATION OF ASPHALTIC CONCRETE. CONCERNING THE MAINTENANCE OF ROADS, THE TECHNIQUE DESCRIBED REQUIRES THE USE OF TWO EMULSIONS. (C) EMULSION RL-1C WHICH BREAKS SLOWLY. ANY GRADING CURVE FOR BITUMINOUS MIXES MAY BE USED. THE BEST ADAPTED EQUIPMENT IS A MOTORIZED PAVER OF THE HETHERINGTON AND BERNER TYPE. SHOULD THE MIXING BE CARRIED OUT "IN-SITU", A ROTOVATOR IS EMPLOYED. THE RESULTS FROM THE DIFFERENT TECHNIQUES USED ON SEVERAL ROADS IN THE ARGENTINE, BRAZIL AND MEXICO ARE PRESENTED. THIS PAPER DEALS WITH A STUDY PRESENTED DURING THE COURSE OF THE SECOND ROUND TABLE CONFERENCE ON ASPHALTS AND EMULSIONS.

  • Authors:
    • VOGT, J
  • Publication Date: 1974-3

Language

  • Spanish

Media Info

  • Pagination: 49-55
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01298465
  • 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 6:46AM