ANALYSIS OF STRESSES IN UNBONDED CONCRETE OVERLAY

The results of a laboratory investigation in which static load tests were conducted on unbonded concrete overlays are presented. The investigation included study of the critical stresses and deflections that occur when an unbonded overlay of a concrete slab on subgrade is loaded at corner, edge, and interior positions and static loads are applied through varying contact areas. The distribution of stresses in the two slabs (overlay and underlying), whose ratio of thickness was varied, was investigated. The investigation was conducted on model-scale slabs. The construction material used for the model slabs was a microconcrete with high flexural strength. Concrete overlays are seen as an important means of strengthening existing concrete pavements. The use of multiple-layered for the new construction of thick slabs is regarded as an innovation in pavement design. The limitation of existing methods for the design of concrete overlays established the need for the investigation. Load-stress characteristics of the overlay systems are presented, and the effect of the warping of the slabs on these characteristics is analyzed to provide an understanding of the behavior of the pavement. The analysis presented is a forerunner to the establishment of a new method of design.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1983/930/930-004.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=ANALYSIS+OF+STRESSES+IN+UNBONDED+CONCRETE+OVERLAY&author=B.+Lall&author=G.+Lees&publication_year=1983
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309036208
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Pavement Rehabilitation. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Lall, Bhagirath
  • Lees, G
• Publication Date: 1983

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 25-31
• Monograph Title: Pavement design, performance, and rehabilitation
• Serial:
  • Transportation Research Record
  • Issue Number: 930
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Concrete; Deflection; Microconcrete; Pavement design; Pavement layers; Pavement overlays; Slabs; Static loads; Stresses; Structural analysis
• Old TRIS Terms: Unbound pavement courses
• Subject Areas: Highways; Materials; Pavements; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00385685
• Record Type: Publication
• ISBN: 0309036208
• Files: TRIS, TRB
• Created Date: Jul 30 1984 12:00AM