EARLY STRENGTH TEST FOR QUALITY CONTROL OF CONCRETE

The time-honored approach to ensure quality of concrete is to take samples at the job site, to mold test cylinders, and then to cure the cylinders under standard conditions for 28 days before testing. The procedure is convenient, the test is simple, and the equipment is dependable. The disadvantage of the 28-day curing is the delay time that neither leads to the early correction of a material problem nor facilitates the prompt removal of defective concrete. Several researchers have demonstrated the feasibility of 24-hour tests to ensure quality control of concrete. Most early tests have been accelerated strength tests employing hot air, steam, or water for curing. The higher temperature require special equipment, make the specimens difficult to handle, and introduce special problems when air-entraining agents and other additives are used. The merits of a simple 24-hour, 100 F (27.8C) hot-water curing and testing procedure are described. Results achieved with the procedures are presented and analyzed. It is concluded that a hot-water curing temperature of 100 F (37.8 C) is adequate. The temperature is low enough to be completely safe for personnel involved and to permit careful handling of test specimens. The equipment required is simple and inexpensive.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1975/558/558-007.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=EARLY+STRENGTH+TEST+FOR+QUALITY+CONTROL+OF+CONCRETE&author=T.+Brockenbrough&author=R.+Larason&publication_year=1975
• Availability:
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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:
  • Brockenbrough, Thomas W
  • Larason, Robert R
• 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; Tables;
• Pagination: pp 61-68
• 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; Concrete; Concrete curing; Concrete tests; Productivity; Quality control; Specimens; Strength of materials; Temperature; Test procedures; Testing equipment
• Uncontrolled Terms: Time savings
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00131693
• Record Type: Publication
• ISBN: 0309024668
• Files: TRIS, TRB
• Created Date: Jun 5 1976 12:00AM