THE INFLUENCE OF CASTING AND CURING TEMPERATURE ON THE PROPERTIES OF FRESH AND HARDENED CONCRETE

Concretes, made with two different cements, were cast in the laboratory at temperatures of 10, 23 and 32 degrees C (50, 73, and 90 degrees F). The concrete mix design was held constant for each cement used in the study. Fresh properties, including slump, air content, and time of initial and final set, were measured. These concretes were moist cured at their casting temperature. In the case of the concrete cast at 23 degrees C (73 degrees F), an additional set of specimens was cured at a temperature of 10 degrees C (50 degrees F). Compressive strength was determined at ages between three and 56 days. Test results show workability, as measured by slump, is greatly affected by casting temperature. Slump at 10 degrees C was as much as 214% of the slump at 23 degrees C, while slump at 32 degrees C (90 degrees F) was as little as 80% of the slump at 23 degrees C. Time of set was similarly affected. Low temperature setting time was as much as 195% of setting time at 23 degrees C. High temperature setting time was as short as 68% of setting time at 23 degrees C. As expected, early age compressive strength of concrete cast and cured at high temperature was greater than concrete cast and cured at 23 degrees C. However, after seven days, compressive strength of concrete cast and cured at high temperature was lower than concrete cast and cured at 23 degrees C. Concrete cast and cured at low temperature had initial strength lower than concrete cast and cured at 23 degrees C. However, later age strength either equaled or exceeded that of concrete cast at 23 degrees C.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0893121436
• Corporate Authors:

  Portland Cement Association

  5420 Old Orchard Road
  Skokie, IL  United States  60077
• Authors:
  • Burg, R G
• Publication Date: 1996

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 14 p.

Subject/Index Terms

• TRT Terms: Air content; Casting; Compressive strength; Concrete; Concrete curing; Concrete hardening; Fresh concrete; Physical properties; Setting (Concrete); Slump test; Temperature; Thermal stresses
• Uncontrolled Terms: Concrete properties; Hardened concrete; Setting time; Slumps
• Old TRIS Terms: Concrete casting
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00738740
• Record Type: Publication
• ISBN: 0893121436
• Report/Paper Numbers: R&D Bulletin RD113T,, PCA R&D Serial No. 2023
• Files: TRIS
• Created Date: Jul 21 1997 12:00AM