INFLUENCE OF TEMPERATURE ON THE DEFLECTION OF ASPHALT PAVEMENTS . THIRD INTERNATIONAL CONFERENCE ON BEARING CAPACITY OF ROADS AND AIRFIELDS. PROCEEDINGS, NORWEGIAN INSTITUTE OF TECHNOLOGY, TRONDHEIM, NORWAY, JULY 3-5 1990. VOLUMES 1-2

This paper presents a theoretical and experimental investigation of the effect of temperature on deflection measurements obtained using: (1) a falling weight deflectometer (FWD); (2) a Benkelman beam; (3) the plate loading test. The theoretical calculations used a multi-layer method. Formulae are given for: (1) the stiffness of asphalt in terms of the stiffness of bitumen and the percentage volumes of aggregate and bitumen; (2) the stiffness of bitumen in terms of temperature, softening point of bitumen, loading time and penetration index. The deflection of any of the measuring instruments has form a b-t, where T is the temperature, and a and b are parameters depending on the instrument and the road structure; b was found to have form c + d h, where h is the thickness of the asphalt and c and d are positive parameters with d much smaller than c. The field tests were performed three times a day for several months at 51 sites in Finland. The FWD measurements were very consistent and accurate, and agreed well with the theoretical calculations. Plate loading tests gave less consistent results. Measurements with a Benkelman beam failed to reveal any correlation between deflection and temperature, probably because of the device's poor accuracy. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/8251910331
• Corporate Authors:

  Tapir

  Trondheim University, Gloeshaugen
  Trondheim-NTH,   Norway 
• Authors:
  • EHROLA, E
  • BELT, J
  • Ryynaenen, T
• Publication Date: 1990

Language

• English

Media Info

• Pagination: p. 281-290
• Serial:
  • Publication of: Tapir Publishers
  • Publisher: Tapir

Subject/Index Terms

• TRT Terms: Asphalt pavements; Bearing capacity; Benkelman beam; Conferences; Deflection; Falling weight deflectometers; Measurement; Pavements; Plate bearing test; Temperature
• Old TRIS Terms: Pavement deflection
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00612265
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 82-519-1033-1
• Files: ITRD, TRIS
• Created Date: Aug 31 1991 12:00AM