FIBROUS PORTLAND CEMENT CONCRETE OVERLAY RESEARCH IN GREENE COUNTY, IOWA

The project was constructed in October 1973 to evaluate the performance of steel fiber-reinforced concrete (fibrous concrete). The 33 fibrous concrete sections, four continuous reinforced concrete sections, two mesh-reinforced sections, and two sections with transverse reinforcing were rated relative to each other on a scale of 0 to 100 at ages of 5 and 10 years. All sections are essentially unbonded to or debonded from the underlying slab. All experimental overlay sections experienced only limited additional deterioration in the 5-10 year period. The 4-in. thick, nonfibrous, mesh, continuously reinforced concrete pavement overlay sections provided the best performance in this research project. A nonfibrous, 5-in. thick, transverse bar-reinforced overlay section with no longitudinal steel performed almost as well. The best performance of a fiber-reinforced concrete section was obtained with 160 lb of fiber per cu yd of concrete. In the fibrous concrete overlays, 750 lb of cement per cu yd provided no benefit over the use of 600 lb of cement per cu yd. The performance of the fibrous overlays was directly related to the fiber content of the concrete mix. The 2.5-in.-long higher aspect ratio fibers produced a higher performance rating than the 1-in.-long lower aspect ratio fibers. The 3-in. thick fibrous concrete overlays performed substantially better than the 2-in. thick fibrous overlays. In general, the thicker, nonfibrous pavement overlay sections constructed at a lower unit cost than the fibrous sections performed better than the fiber-reinforced concrete overlays.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1985/1040/1040-001.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=FIBROUS+PORTLAND+CEMENT+CONCRETE+OVERLAY+RESEARCH+IN+GREENE+COUNTY%2C+IOWA&author=R.+Betterton&author=M.+Knutson&author=V.+Marks&publication_year=1985
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309039568
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Rigid Pavement Construction. 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:
  • Betterton, R M
  • Knutson, M J
  • Marks, Vernon J
• Publication Date: 1985

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 1-7
• Monograph Title: Concrete pavement construction
• Serial:
  • Transportation Research Record
  • Issue Number: 1040
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Alternatives analysis; Continuously reinforced concrete pavements; Costs; Durability; Fiber reinforced concrete; Pavement overlays; Pavements; Portland cement concrete; Thickness; Wire mesh
• Uncontrolled Terms: Pavement thickness
• Geographic Terms: Greene County (Iowa)
• Subject Areas: Construction; Finance; Highways; Materials; Pavements; Vehicles and Equipment; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 00459224
• Record Type: Publication
• ISBN: 0309039568
• Files: TRIS, TRB
• Created Date: Oct 31 1986 12:00AM