RESURFACING AND PATCHING CONCRETE PAVEMENTS WITH BONDED CONCRETE

RESURFACING OR PATCHING OF OLD CONCRETE PAVEMENTS WITH BONDED CONCRETE HAS BEEN EXTENSIVELY STUDIED AND FOUND TO BE FEASIBLE. MANY FACTORS ARE INVOLVED IN DEVELOPING THE GOOD BOND BETWEEN OLD AND NEW CONCRETE SO ESSENTIAL FOR THIN RESURFACING AND PATCHING. THIS REPORT COVERS LABORATORY BOND TESTS, EXPERIMENTAL FIELD PROJECTS, A SURVEY OF PROJECTS IN USE, AND RECOMMENDED PRACTICES. THE LABORATORY DATA AND FIELD WORK INDICATE THAT BOND STRENGHTS, AS DETERMINED BY A SHEAR TEST, MAY FREQUENTLY BE 400 PSI OR MORE, BUT THAT STRENGTHS OF 200 PSI OR EVEN LESS MAY BE ADEQUATE. THE TWO MAIN FACTORS GOVERNING BOND ARE: (1) THE STRENGTH AND INTEGRITY OF THE OLD BASE CONCRETE, AND (2) THE CLEANNESS OF THE OLD SURFACE. MECHANICAL CLEANING WAS FOUND TO BE ESSENTIAL IF A WEAK SURFACE LAYER IS PRESENT, WHEREAS CLEANING OF SOUND CONCRETE CAN BE ACCOMPLISHED WITH HYDROCHLORIC (MURIATIC) ACID. BEST BOND WAS OBTAINED WHEN THE BASE CONCRETE WAS DRY AND GROUTED. GOOD COMPACTION OF THE FRESH CONCRETE IS ALSO REQUIRED FOR A STRONG BOND. OTHER FACTORS OF IMPORTANCE INCLUDE THE PRECISE PLACEMENT OF NEW JOINTS OVER OLD ONES, AND ADEQUATE CURING OF THE FRESH CONCRETE. THE PERFORMANCE OF EXPERIMENTAL PROJECTS AND OTHER PROJECTS IN SERVICE SHOWS THAT PROPERLY BONDED SURFACES WILL WITHSTAND EXTREME CLIMATIC CONDITIONS AND HEAVY TRAFFIC. THIN BONDED RESURFACES GIVING SATISFACTORY SERVICE DATE BACK TO 1913. RECOMMENDED PRACTICES ARE GIVEN. THEY SPECIFY IN DETAIL TECHNIQUES WHICH HAVE PROVED TO BE THE BEST FOR SUCCESSFULLY BONDING OLD AND NEW CONCRETE. THE NEED FOR GOOD WORKMANSHIP AND SUITABLE MATERIALS, ESSENTIAL IN APPLYING THE RECOMMENDED PRACTICES, CANNOT BE OVEREMPHASIZED. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/35/35-029.pdf
• Supplemental Notes:
  • Vol 35, pp 444-469, 5 TAB, 27 PHOT, 14 REF 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:
  • Felt, E J
• Publication Date: 1956

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Thirty-Fifth Annual Meeting of the Highway Research Board, Washington, D.C., January 17-20, 1956
• Serial:
  • Highway Research Board Proceedings
  • Volume: 35
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Bonding; Bonds; Cleaning; Compaction; Concrete; Concrete pavements; Field tests; Laboratory tests; Patching; Pavement maintenance; Recommendations; Resurfacing; Strength of materials; Surfaces
• Uncontrolled Terms: Surface area
• Subject Areas: Highways; Maintenance and Preservation; Research;

Filing Info

• Accession Number: 00218784
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 15 1971 12:00AM