OVERLAY DESIGN BASED ON FALLING WEIGHT DEFLECTOMETER MEASUREMENTS: A COMPARISON BETWEEN TWO METHODS

The theme of this study is to compare two methods of overlay design, as regards the number and types of variables involved, sensitivity to experimental errors and in general their practicability. Both methods assume a pavement evaluation method which provides information about material properties of the existing pavement. The study continues to describe how the two methods, using results of pavement evaluation, can be applied to design an overlay. Four comparative examples are treated, followed by a sensitivity analysis. A study of the results establsihed reasonable agreement between the methods when applied to structures with unbound base layers. The differences in required overlay were more pronounced when the methods were applied to full depth asphalt structures. The study does not allow safe conclusion regarding the values of computed parameters such as the subgrade modulus and the total thickness of asphalt, but certain trends are clearly established. It is to be borne in mind that many relationships are only approximate and that the results are left to lie within certain limits of accuracy. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/1650867X
• Corporate Authors:

  Royal Institute of Technology, Sweden

  Institutionen foer Vaegbyggnad, Fack S-10044
  Stockholm 70,   Sweden 
• Authors:
  • Ssozi, N H
• Publication Date: 1983-4

Media Info

• Features: Figures; Photos; References;
• Pagination: 49 p.
• Serial:
  • Publication of: Royal Institute of Technology, Sweden
  • Publisher: KTH Royal Institute of Technology, Sweden
  • ISSN: 1650-867X

Subject/Index Terms

• TRT Terms: Asphalt pavements; Bearing capacity; Coefficient of subgrade reaction; Deflectometers; Design; Falling weight deflectometers; Full-depth asphalt pavements; Measurement; Overlays (Pavements); Pavement design; Poisson distributions; Poisson ratio; Sensitivity analysis; Thickness; Young's modulus
• ITRD Terms: 3085: Bearing capacity; 6187: Deflectograph; 6136: Measurement; 5919: Modulus of elasticity; 3055: Pavement design; 5924: Poisson's ratio; 3096: Strengthening (pavement); 5933: Thickness
• Subject Areas: Design; Highways; Maintenance and Preservation; Pavements; I22: Design of Pavements, Railways and Guideways; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00392521
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Report/Paper Numbers: 1983:4 Monograph
• Files: ITRD, TRIS
• Created Date: Mar 29 1985 12:00AM