THIN ASPHALT SURFACINGS USING COLD MIX TECHNOLOGY

This paper describes the development of Cold Mix/Cold Lay asphalt mixtures incorporating Bitumen Emulsion which demonstrate engineering properties which are equivalent to the same mixtures produced in a traditional hot coating process. Cold mixes demonstrate enhanced workability characteristics compared to their hot-mix counterparts, which makes them suitable for the trench reinstatement market. In addition, they can be machine laid as macadams or thin textured asphalts for specific jobs where the materials workability and storage life offsets the increased material cost. The introduction of the Highway Authorities and Utilities Committee (HAUC) Specification in 1992 provided the necessary performance guide on which material suppliers could base their designs. The importance of relating cold mix design to expected performance in the field is covered in the paper. Typical data, including elastic stiffness, dyanmic creep and residual voids obtained on field cores, is presented. Brief details of utility reinstatement and machine lay trials involving Tarmac are given. Energy saving aspects are also considered should cold mixtures gain commercial acceptance in the UK. The paper concludes that cold asphalt mixtures are a technically viable alternative to 'hot' materials and suggests that they will become increasingly adopted by utility contractors in the years ahead for reinstatement works. Growth in machine laid cold mixtures will depend largely on how quickly a specification is developed. (A) For the covering abstract see IRRD 890024.

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• Corporate Authors:

  AEDIFICATIO PUBLISHERS

  IMMENTALSTR 34
  FREIBURG I.BR,   Germany  D-79104
• Authors:
  • ROBINSON, H L
• Conference:
  • PERFORMANCE AND DURABILITY OF BITUMINOUS MATERIALS. PROCEEDINGS OF THE SECOND EUROPEAN SYMPOSIUM ON PERFORMANCE AND DURABILITY OF BITUMINOUS MATERIALS, LEEDS, APRIL 1997
• Publication Date: 1997

Language

• English

Media Info

• Features: References;
• Pagination: p. 369-83

Subject/Index Terms

• TRT Terms: Cold coated materials; Conferences; Creep; Durability; Energy conservation; Maintenance; Pits; Porosity; Stiffness; Surfacing
• ITRD Terms: 4988: Cold coated material; 8525: Conference; 4732: Creep (mater); 5910: Durability; 212: Energy conservation; 5702: Excavation pit; 3847: Maintenance; 5938: Porosity; 5931: Stiffness; 2972: Surfacing
• Subject Areas: Energy; Environment; Maintenance and Preservation;

Filing Info

• Accession Number: 00739327
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 3-931681-14-9
• Files: ITRD
• Created Date: Aug 28 1997 12:00AM