RECENT DEVELOPMENTS IN THE USE OF TAR FOR HIGHWAYS IN THE UNITED KINGDOM (PART 1)

The use of natural gas instead of coal-based town gas has forced the tar industry to rely on the steel industry and smokeless fuel producers for its crude supplies. The author discusses the effect of market factors on road tar utilisation. The British standard BS76 has been changed in recent years leading to the adoption of the Beckton tray test for coated macadam tars and the Segas hardening test for surface dressing tars. The properties of tars from low-temperature-carbonisation are examined and results given of experimental surface dressing trials. Trials have also been carried out using low-temperature-carbonisation tars in dense coated-macadam road base, basecourse and single-coarse materials. The restricted use of low-temperature tar for surface dressings on heavily trafficked roads may soon be modified by full-scale evidence on its performance. The requirements of tar-bitumen which may now be used in rolled asphalt to BS594 are discussed. The use and properties of polymer-modified tars are mentioned. /TRRL/

• Corporate Authors:

  British Tar Industry Association

  London,   England 
• Authors:
  • NICHOLAS, J H
• Publication Date: 1977

Language

• English

Media Info

• Features: Tables;
• Pagination: p. 4-8
• Serial:
  • Road Tar and Allied Binders
  • Volume: 31
  • Issue Number: 1

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Base course (Pavements); Bitumen; Bituminous mixtures; Carbonates; Low temperature; Macadam; Polymerization; Polymers; Seal coats; Tar; Temperature; Tests
• Uncontrolled Terms: Use
• Geographic Terms: United Kingdom
• ITRD Terms: 2990: Basecourse; 4986: Bitumen tar mixture; 4967: Bituminous mixture; 7312: Carbonate; 7481: Polymerization; 2961: Roadbase; 2984: Surface dressing; 4984: Tar; 6722: Temperature; 6255: Test; 8119: United Kingdom; 9084: Use
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00170338
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jun 28 1978 12:00AM