SEMINAR ON COLD MIX TECHNIQUE

KRETSLOPP OCH KALL ASFALTSTEKNIK: SEMINARIUM 1 APRIL 1998, HOTELL SHERATON, STOCKHOLM: SAMMANFATTNING AV FOEREDRAGEN

The government wants Sweden to be in the vanguard of sustainable development, with SEK 5,400m allocated to different projects. The construction sector must (1) Remove harmful substances; (2) Develop new healthy materials; (3) Recycle asphalt, concrete, gravel, timber etc; and (4) Reduce amount of waste deposited in landfill. The construction sector must undertake to (a) improve environmental competence; (b) limit future environmental problems; (c) develop construction product statements; (d) identify environmentally harmful waste; (e) sort waste products at source; and (f) halve the amount of waste to landfill by 2000. The road sector consumes 60 per cent of the annual production of crushed rock and 65 per cent of natural gravel. Other large material flows are bitumen, cement, salt and steel. The order of priority in recycling is re-use, recovery of materials, recovery of energy, and landfill. In hot mixing asphalt, the temperature must be restricted to limit emissions. In cold mixing, emulsion used as binder contains up to 10 per cent naphtha which is an environmental problem. Quaternary amines which are not biodegradable and toxic to aquatic organisms are being phased out. Diamines now used are better. Development of degradable and non-toxic emulsifiers is in progress. In France, development of cold recycling started at end of the 80s. Hot in-situ recycling is mainly used for reshaping motorways. In Norway, a large cold mix project had the object of improving bearing capacity of roadbase, developing functional wearing courses and improving maintenance when using cold mix on low traffic roads.

  • Corporate Authors:

    Foereningen foer Asfaltsbelaeggningar i Sverige

    Industrigatan 2B
    Stockholm,   Sweden 
  • Publication Date: 1998

Language

  • Swedish

Media Info

  • Pagination: 103 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00793525
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Files: ITRD
  • Created Date: Jun 15 2000 12:00AM