EFFECTS OF COOLING RATES ON THE DURABILITY OF CONCRETE

Past research generally assumed that rapid cooling rates cause faster deterioration of concrete that is susceptible to damage from freezing and thawing. The objective of this project was to investigate the effect of varying freezing rates on an otherwise standard ASTM test. Eighty-one concrete specimens were fabricated with an aggregate capable of causing deterioration under freezing-and-thawing conditions. The aggregates were placed in the concrete at 3 different degrees of saturation. Three rates of cooling were used: 4.4 F/hour (2.45 C/hour); 6.6 F/hour (3.67 C/hour); and 13.3 F/hour (7.39 C/hour). Modifications to freezing and thawing equipment are described, and possible explanations of the results obtained are presented. If the aggregate was not initially saturated when placed in the concrete, slower freezing rates produced demonstrably faster rates of deterioration. It is theorized that a slower rate of cooling enables more water to migrate to the surroundings of the coarse aggregate. Therefore, during the thawing phase, more water is available for the coarse aggregate to become increasingly saturated. Rate of cooling seemed not to affect the rate of deterioration of concrete aggregates placed in the concrete already in the saturated state.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1975/539/539-002.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=EFFECTS+OF+COOLING+RATES+ON+THE+DURABILITY+OF+CONCRETE&author=C.+Lin&author=R.+Walker&author=W.+Payne&publication_year=1975
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Performance of Concrete-Physical Aspects. 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:
  • Lin, Chung-Hsing
  • Walker, Richard D
  • Payne, W W
• Discussers:
  • Famili, H
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1975

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 8-19
• Monograph Title: Corrosion, Concrete, Quality Control, and Paint Beads
• Serial:
  • Transportation Research Record
  • Issue Number: 539
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Aggregates; Concrete; Cooling; Durability; Freeze thaw durability; Freeze thaw tests; Percent saturation; Rates
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00126828
• Record Type: Publication
• ISBN: 0309023904
• Files: TRIS, TRB
• Created Date: Dec 16 1975 12:00AM