CANADIAN EXPERIENCE IN THE USE OF THE MODIFIED BOILING METHOD

This paper briefly reviews the history of accelerated-curing techniques for quality control of concrete. In a modified boiling method that has been developed by the Mines Branch, the test specimens are standard cured for 23 to 23.5 hours, then boiled for 2.5 hours, and tested for compression 1.5 hours after being boiled. The total elapsed time between molding and testing of cylinders does not exceed 28.5 hours. This method is finding increasing acceptance in Canada and has been adopted by the American Society for Testing and Materials and the Canadian Standards Association. The data from Hydo-Quebec, Acres-Bechtel, a ready-mix concrete company in Ottawa, and the University Calgary, Alberta, show significant correlations between the results of the accelerated and 28-day compressive strength tests. The original regression equation reported by the Mines Branch relating the compressive strength of accelerated-cured cylinders to that of 28-day standard-cured cylinders has been compared with the equation developed at the University of Calgary, and the two regression lines are about identical. Each testing and control authority contemplating the use of the modified boiling method is urged to develop its own correlations for predicting 28-day compressive strengths and not to rely on the correlations published by others.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1975/558/558-002.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=CANADIAN+EXPERIENCE+IN+THE+USE+OF+THE+MODIFIED+BOILING+METHOD&author=V.+Malhotra&publication_year=1975
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309024668
• 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:
  • Malhotra, V M
• 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 13-18
• Monograph Title: Recent developments in accelerated testing and maturity of concrete
• Serial:
  • Transportation Research Record
  • Issue Number: 558
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accelerated tests; Boiling; Compressive strength; Concrete; Concrete curing; Correlation analysis; Equations; Forecasting; Quality control; Regression analysis; Specimens
• Subject Areas: Data and Information Technology; Highways; Materials;

Filing Info

• Accession Number: 00131688
• Record Type: Publication
• ISBN: 0309024668
• Files: TRIS, TRB
• Created Date: Jun 5 1976 12:00AM