EARLY STRENGTH OF CONCRETE PATCHING MATERIALS AT LOW TEMPERATURES

Winter repair and maintenance operations of concrete bridge decks and pavement require high early strength patching materials suitable for application at subfreezing temperatures. An extensive experimental program at Rutgers University has identified four generic materials as potentially suitable to fulfil this role. Early strength tests included compressive cylinder strength of patching material and slant shear bond strength to existing concrete at 1 day and 7 days, and static and fatigue flexure strength of patched specimens at 7 days. All patch materials were cast and cured at temperatures of 15 deg F to 20 deg F. The four generically distinct materials identified were: (a) a methyl methacrylate-based material, (b) two types of magnesium phosphate-based materials, and (c) a polyurethane binder. Early strengths ranged from 1,700 psi to more than 8,000 psi. Slant shear bond strengths ranged from 2,000 psi to more than 5,000 psi. Flexural strengths, both in static and fatigue loading, are also suitable, with most materials displaying performance comparable to that of the control (unpatched) specimens. Flexure test results, however, are highly variable. The causes of this variability and ways of reducing it need further investigation.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1987/1110/1110-004.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=EARLY+STRENGTH+OF+CONCRETE+PATCHING+MATERIALS+AT+LOW+TEMPERATURES&author=E.+Nawy&author=A.+HANAOR&author=P.+Balaguru&author=S.+Kudlapur&publication_year=1987
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Mechanical Properties of Concrete. 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:
  • Nawy, Edward G
  • Hanaor, Ariel
  • Balaguru, Perumalsamy N
  • Kudlapur, Shivaprasad
• Conference:
  • 66th Annual Meeting of the Transportation Board
  • Location: Washington District of Columbia, United States
  • Date: 1987-1-12 to 1987-1-15
• Publication Date: 1987

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 24-34
• Monograph Title: Concrete and Concrete Construction
• Serial:
  • Transportation Research Record
  • Issue Number: 1110
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Bond strength (Materials); Bonding; Bridge decks; Cement; Compression tests; Concrete; Concrete pavements; Fatigue tests; Flexural strength; Inorganic phosphates; Magnesium compounds; Methyl methacrylate; Patching; Polymer concrete; Polyurethane resins; Portland cement concrete; Static loads; Strength of materials
• Uncontrolled Terms: Magnesium phosphate
• Old TRIS Terms: Compressive strength tests; Static loading
• Subject Areas: Highways; Maintenance and Preservation; Materials; I32: Concrete; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00464514
• Record Type: Publication
• ISBN: 030904460X
• Files: TRIS, TRB
• Created Date: Dec 31 1987 12:00AM