BLANKET CURING TO PROMOTE EARLY STRENGTH CONCRETE

Fast Track concrete has proven to be successful in obtaining high early strengths. This benefit does not come without cost. Special Type III cement and insulating blankets to accelerate the cure add to its expense when compared to conventional paving. This research was intended to determine the benefit derived from the use of insulating blankets to accelerate strength gain in three concrete mixes using Type I cement. The goal was to determine mixes and curing procedures that would result in a range of opening times. This determination would allow the most economical design for a particular project by tailoring it to a specific time restraint. Three mixes of various cement content were tested in the field. Flexural beams were cast for each mix and tested at various ages. Two test sections were placed for each mix, one section being cured with the addition of insulating blankets and the other being cured with only conventional curing compound. Iowa Department of Transportation specifications require 500 psi flexural strength before a pavement can be opened to traffic. Concrete with Fast Track proportions (nominal 7 1/2 bag), Type I cement, and insulating blankets reached that strength in approximately 36 hr, a standard mix (nominal 6 1/2 bag) using the blankets in approximately 48 hr, and the Fast Track proportions with Type I cement without blankets in about 60 hr. The results showed a significant improvement in early strength gain with the use of insulating blankets.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1989/1234/1234-001.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=BLANKET+CURING+TO+PROMOTE+EARLY+STRENGTH+CONCRETE&author=J.+Grove&publication_year=1989
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309049504
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1234, Concrete and Construction: New Developments and Management. 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:
  • Grove, Jim
• Publication Date: 1989

Media Info

• Features: Figures; Tables;
• Pagination: p. 1-7
• Monograph Title: Concrete and construction: new developments and management
• Serial:
  • Transportation Research Record
  • Issue Number: 1234
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accelerating agents; Benefits; Cement; Cement content; Concrete curing; Economics; Field tests; Flexural strength; Mix design; Time
• Old TRIS Terms: Accelerating, process; Blanket; Cement type; Time factor
• Subject Areas: Economics; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00494988
• Record Type: Publication
• ISBN: 0309049504
• Files: TRIS, TRB, ATRI
• Created Date: Jun 30 1990 12:00AM