CHEM-CRETE ASPHALTS --BITUMEN, FLEXIBLE AND DURABLE. 3RD EUROBITUME SYMPOSIUM 1985, THE HAGUE, NETHERLANDS, SEPTEMBER 11-13, 1985

Chem-crete asphalts are asphalts in which the binder is chem-crete modified bitumen. Chem-crete modifier is an oil-based soap containing metal salts. The modifier acts as a catalyst causing the bitumen to polymerize by forming complex bonds between the metal-ions and the molecules of the bitumen. Chem-crete modifier has been tested at several laboratories in Europe, where it was found that chem-crete asphalt significantly improves asphalt-properties like: marshall-stability, creep, temperature-susceptibility, elasticity, fatigue-properties. Special sand-asphalts show greatly improved properties using chem-crete modified bitumen, i.e. About a seven-fold increase in the marshall-stability. The bitumen molecules which are active in the chem-crete reaction are the molecules which normally are active in the ageing-process of the bitumen, and the chem-crete protection of the active ageing sites in the bitumen make chem-crete asphalts interesting especially in wearing courses. The improvements in stability, fatigue properties, etc makes chem-crete asphalt interesting in base courses, in which layer-thickness can be reduced up to 20% depending on the design-criteria. Since 1981 several types of wearing courses and base courses using chem-crete asphalt have been laid in Denmark, and until today all of the pavements where chem-crete reactions have taken place, have behaved satisfactorily.(a) for the covering abstract of the symposium see IRRD 815173.

• Corporate Authors:

  EUROBITUME

  BD EMILE BOCKSTAEL 351
  Bruxelles, ZZ Belgique   
• Authors:
  • Korsgaard, H C
• Publication Date: 1985

Language

• Undetermined

Media Info

• Pagination: p. 551-7
• Serial:
  • Publication of: EUROBITUME
  • Publisher: EUROBITUME

Subject/Index Terms

• TRT Terms: Base course (Pavements); Binders; Bitumen; Bituminous mixtures; Conferences; Creep; Elasticity (Mechanics); Fatigue (Mechanics); Stability (Mechanics); Temperature; Thickness; Wearing course (Pavements)
• Uncontrolled Terms: Modifications
• Subject Areas: Data and Information Technology; Highways;

Filing Info

• Accession Number: 00482152
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Apr 30 1989 12:00AM