DYNAMIC DEFLECTIONS OF PAVEMENT: MEASUREMENTS, INTERPRETATIONS AND APPLICATIONS

Recent emphasis by highway agencies on pavement management system makes it almost imperative to monitor the in-service behavior of pavements periodically and systematically. Pavement deflection measurements are increasingly being used as a part of this state-wide monitoring system. Equipment like dynaflect, road rater and wes vibrator are used for dynamic deflection measurements, among which dynaflect is the most used one in the United States. Five performance parameters - dmd, sci, bci, sp and w5 are associated with the dynaflect measurements. The physical significance of each of these parameters is described. A structural diagnosis chart utilizing all the parameters is presented to estimate the structural characteristics of the measured pavement system. A nomograph is presented to check the adequacy of sample size of pavement deflections at 95 percent confidence level. Significance of temperature adjustment factor and seasonal adjustment factor is enumerated. Design charts to determine overlay thickness of flexible pavements based on dmd and sci crtieria are presented. Application of dynaflect deflections in the evaluation of hot and cold recycled pavements is also discussed. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/8251904803
• Supplemental Notes:
  • Proceedings of the International Symposium on Bearing Capacity of Roads and Airfields, Volume 2, Trondheim, June 23-25, 1982.
• Corporate Authors:

  Tapir

  Trondheim University, Gloeshaugen
  Trondheim-NTH,   Norway 

  Tapir

  Trondheim University, Gloeshaugen
  Trondheim-NTH,   Norway 
• Authors:
  • BANDYOPADHYAY, S
• Conference:
  • Proceedings of the International Symposium on Bearing Capacity of Roads and Airfields, Volume 2, Trondheim, June 23-25, 1982.
• Publication Date: 1982

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 858-869

Subject/Index Terms

• TRT Terms: Calculation; Conferences; Deflection; Dynaflect; Flexible pavements; Measurement; Monitoring; Overlays (Pavements); Pavement management systems; Pavements; Recycling; Thickness
• Old TRIS Terms: Dynaflect deflections; Pavement analysis
• ITRD Terms: 6464: Calculation; 8525: Conference; 5586: Deflection; 2944: Flexible pavement; 6136: Measurement; 2955: Pavement; 4573: Recycling (mater); 3096: Strengthening (pavement); 5933: Thickness
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00376493
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• ISBN: 82-519-0480-3
• Report/Paper Numbers: Proceeding
• Files: ITRD, TRIS
• Created Date: Aug 30 1983 12:00AM