DEVELOPMENTS IN FLEXIBLE ROAD CONSTRUCTION

IN RECENT TIMES BITUMINOUS SURFACINGS HAVE BEEN SUBJECTED TO INCREASED ATTACKS FROM AXLE LOADS, SPEED, STUDDED TIRES AND DE-ICING SALTS. BLOWN BITUMEN SHOULD INCREASE THE PLASTICITY RANGE AT LOWER TEMPERATURES. ADDITIONS OF RUBBER, LATEX, AND COPOLYMERISATES IMPROVE THE QUALITY OF THE BITUMEN, AS DO ADMIXTURES OF PVC AND CHANGES IN THE PARTICLE SIZE DISTRIBUTION. GUSSASPHALT IS BECOMING AN ECONOMIC PROPOSITION BECAUSE OF HIGH-CAPACITY MIXING PLANT. AS REGARDS IMPROVED SUBGRADES THE TREND IS TOWARDS REDUCED THICKNESSES. IMPROVED ROLLING, DUSTFREE MIXING AND THE HEAT INSULATING COURSES ARE AMONG THE LATEST DEVELOPMENTS. FURTHER RESEARCH IS BEING CARRIED OUT. /TRRL/

• Authors:
  • GRAGGER, F
• Publication Date: 1970

Language

• English

Media Info

• Features: Photos; References;
• Pagination: p. 214-20
• Serial:
  • Bitumen, Terre, Asphalte, Peche u Verwardte Staffe
  • Volume: 21
  • Issue Number: 5

Subject/Index Terms

• TRT Terms: Asphalt; Bituminous materials; Copolymers; Flexible pavements; Gussasphalt; Heat insulating materials; Latex; Mixing; Plasticity; Polyvinyl chloride; Quality control; Rolling; Rubber; Subgrade (Pavements); Surface treating; Thickness
• Uncontrolled Terms: Particle size distribution; Quality
• Old TRIS Terms: Bituminous surfacing; Blown asphalt
• Subject Areas: Construction; Highways; Materials;

Filing Info

• Accession Number: 00211301
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: Dec 4 1973 12:00AM