NEW BITUMINOUS MIXING PROCESS: THE ERMONT DRUM - DRYER - MIXER - REPORT OF TESTS

UN NOUVEAU PROCEDE D'ENROBAGE; LE TAMBOUR-SECHEUR-MALAXEUR ERMONT - COMPTE RENDU D'EXPERIMENTATION

After a general introduction, describing the reasons which since 1976 have led to a series of tests on a process, the economic implications of which are of prime importance in present day construction, three chapters present the points of view of the manufacturer, the contractor (Colas) and the sponsor (Ministere de l'Equipement) on the new bituminous mixing process which is characterised by drying and mixing in the same drum, hence elimination of the separate mixer and simplification of the dust removal equipment. The process allows lower temperature bituminous mixes to be produced, hence a saving in energy. The test plant - TSM 25105 - with a capacity of 150 to 350 t/h, has shown the general advantages of the process: reduced capital and operating costs, simplicity and flexibility of operation, protection of the environment at a lesser cost, mobility. In addition the TSM has proved its adaptability to hard bitumen, its independence of moisture content of the aggregate, the compliance with the residual water content imposed by international standards, the capability of producing low temperature bituminous mixtures, but also those at traditional temperatures. The extensive measurements and laboratory analyses carried out by the administration have studied the ageing of bitumen, the reduction of mix temperature, bitumen content, the residual water content, mix homogeneity and suitability for compaction. (TRRL)

  • Authors:
    • POIRIER, J C
    • SAUTEREY, R
    • Malbrunot, P
    • Lasalle, J
    • Baroux, R
    • Faure, M
  • Publication Date: 1977-5

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00323387
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jun 12 1981 12:00AM