RESEARCH INTO THE COMPACTION OF BITUMINOUS MATERIALS

After pointing out that good compaction increases durability, reduces deformation and increases stiffness and strength, the authors discuss present specifications and the methods used to measure the state of compaction. Studies of a number of factors that affect the state of compaction are reviewed: these include aggregate type, stiffness of working platform, binder content, compacture effort (including correlation between roller passes and level of compaction and their distribution across the laid width), traffic, roller speed, temperature, thick lift construction. Methods of increasing compaction on the nearside are laying the hard shoulder and nearside lane together and modifying the pattern of rolling operations. The relation between compaction and pavement performance is studied and a detailed investigation made of the deflection of the macadam base and its foundation, the dynamic modulus of the macadam and the tracking of cores at elevated temperatures. It is concluded that improving compaction improves pavement performance, and that it is possible to construct more economic macadam bases by reducing binder content and improving compaction. For the covering abstract of the seminar see IRRD abstract no 212145. /TRRL/

• Corporate Authors:

  Asphalt and Coated Macadam Association, Limited

  25 Lower Belgrave Street
  London SW1,   England 
• Authors:
  • Lister, N W
  • Powell, W D
• Publication Date: 1974

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 54 p.

Subject/Index Terms

• TRT Terms: Aggregates; Binder content; Bitumen; Bituminous construction; Bituminous macadam; Bituminous mixtures; Compaction; Compactors; Deflection; Durability; Modulus of elasticity; Pavement base course; Pavement performance; Pavements; Rollers; Stiffness; Temperature; Tracking systems; Traffic
• Uncontrolled Terms: Compaction equipment; Tracking
• Old TRIS Terms: Pavement deflection
• ITRD Terms: 4577: Aggregate; 4929: Binder content; 4921: Bitumen macadam; 4967: Bituminous mixture; 3686: Compaction; 5586: Deflection; 5910: Durability; 5919: Modulus of elasticity; 2961: Roadbase; 3684: Roller; 5931: Stiffness; 6722: Temperature; 755: Traffic
• Subject Areas: Geotechnology; Highways; Materials; Operations and Traffic Management; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00097678
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Conf Paper
• Files: ITRD, TRIS
• Created Date: Sep 30 1975 12:00AM