NEW METHOD TO REDUCE PAVEMENT CRACKING

Details are given of a new process for reducing or preventing cracking due to thermal stresses and cracking caused by sliding of the subgrade due to seasonal variations in moisture content, in both flexible and rigid pavements. This new method was experimentally tested. The test results were applied to roads subjected to repeated failure. Eight years later, the pavement of these roads is still in satisfactory condition. The process consists in laying a thin flexible layer of "rusament" on the roadbase or on an already laid pavement before applying the wearing course. Rusament is prepared from old crushed tyres, emulsified asphalt, sand and aggregates less than 3 mm in dimension. It was determined that the movements of the sub-base or the roadbase sufficient to cause cracking of the asphaltic concrete wearing course were approximately 300% larger if this thickness was 6,4 mm. (TRRL)

• Corporate Authors:

  Springer Verlag

  175 5th Avenue
  New York, NY  United States  10010
• Authors:
  • Bynum Jr, D
• Publication Date: 1980-7-8

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 309-314
• Serial:
  • Materiaux & Constructions/Materials & Structures
  • Volume: 13
  • Issue Number: 76
  • Publisher: International Union of Testing and Research Laboratories for Mat & St

Subject/Index Terms

• TRT Terms: Base course (Pavements); Bitumen; Cracking; Emulsions; Flexible pavements; Heat; Interfaces; Moisture content; Motion; Pavement cracking; Pavement layers; Prevention; Rigid pavements; Rubberized bitumen; Sand; Seasons; Subbase (Pavements); Subgrade (Pavements); Tires; Waste products (Materials); Wearing course (Pavements)
• Uncontrolled Terms: Decreases; Seasonal variations; Sliding; Subbase
• ITRD Terms: 4963: Bitumen; 4993: Bitumen emulsion; 4563: By product; 5211: Cracking; 9009: Decrease; 2944: Flexible pavement; 6743: Heat; 5429: Interface; 2952: Layer; 5483: Movement; 2964: Rigid pavement; 2961: Roadbase; 4105: Sand; 1381: Tyre; 2980: Wearing course
• Subject Areas: Construction; Highways; Pavements; Security and Emergencies; Vehicles and Equipment; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 00348884
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Files: ITRD, TRIS
• Created Date: Jun 30 1982 12:00AM