EXPERIMENTS WITH CONTINUOUS REINFORCEMENT IN CONCRETE PAVEMENTS

CHANGES IN PAVEMENT ELEVATION HAVE BEEN GENERALLY SMALL AND THERE IS NOTHING TO INDICATE THAT THESE CHANGES HAVE AFFECTED THE STRUCTURAL CONDITION OF THE VARIOUS SECTIONS. THE ANNUAL CYCLE OF LENGTH CHANGE OF THE VARIOUS SECTIONS SHOWS THAT THOSE APPROXIMATELY 150-FT. LONG MOVE WITH AS MUCH FREEDOM AS THE VERY SHORT SECTIONS. THE MOVEMENT OF SECTIONS GREATER THAN 150-FT. IN LENGTH IS APPARENTLY RESTRAINED BY THE SUBGRADE AND THIS RESTRAINT IS PROGRESSIVELY GREATER AS THE SECTION LENGTH IS INCREASED. IN THE LONG, HEAVILY-REINFORCED SECTIONS MANY FINE CRACKS HAVE DEVELOPED IN THE CENTRAL AREA. IN THE SECTIONS OF INTERMEDIATE LENGTH CONTAINING 1/2-IN. STEEL BARS A MODERATE AMOUNT OF CRACKING HAS DEVELOPED, WHILE ONLY A VERY LIMITED AMOUNT OF CRACKING HAS OCCURRED IN THE SHORT SECTIONS CONTAINING WELDED WIRE FABRIC. WHILE THE WIDTH OF THE CRACKS IS SLIGHTLY GREATER IN THE SECTIONS CONTAINING THE SMALLER AMOUNTS OF LONGITUDINAL STEEL THERE IS NO EVIDENCE OF SPALLING, RAVELING, DISINTEGRATION, STEEL FAILURE OR OTHER STRUCTURAL WEAKNESS AT ANY OF THE CRACKS. A RELATION BETWEEN THE LENGTH OF THE SECTION AS CONSTRUCTED AND THE AVERAGE SLAB LENGTH (OR A DISTANCE BETWEEN TRANSVERSE CRACKS) APPEARS TO EXIST. SO FAR, NO RELATION HAS BEEN FOUND BETWEEN THE AVERAGE SLAB LENGTH AND EITHER THE TYPE OR THE AMOUNT OF LONGITUDINAL STEEL. RELATIVE ROUGHNESS DETERMINATIONS OVER THE VARIOUS SECTIONS SHOW THAT THE SURFACE OF THE SECTIONS WAS VERY SMOOTH AFTER ABOUT 18 MONTHS OF SERVICE. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/20/20-021.pdf
• Supplemental Notes:
  • Vol 20, pp 354 - 371, 20 FIG, 6 TAB. 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:
  • Cashell, H D
  • Benham, S W
• Publication Date: 1941

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Twentieth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 3-6, 1940
• Serial:
  • Highway Research Board Proceedings
  • Volume: 20
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Altitude; Continuously reinforced concrete pavements; Experiments; Length; Longitudinal reinforcement; Pavement cracking; Roughness; Seasons; Tensile strength; Transverse reinforcement
• Uncontrolled Terms: Elevation; Seasonal variations
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00209419
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 15 1971 12:00AM