SOME PHYSICAL PROPERTIES OF CONCRETE AT HIGH TEMPERATURES

EXPERIMENTAL TECHNIQUES ARE DESCRIBED AND DATA ARE PRESENTED ON THE THERMAL EXPANSION, DENSITY, AND DYNAMIC MODULUS OF ELASTICITY OF CONCRETE IN THE RANGE OF 75 TO 1500 F. THE RESULTS INDICATE THAT WEIGHT LOSS DUE TO LOSS OF WATER IS SUBSTANTIALLY COMPLETE AT 800 F. AT HIGHER TEMPERATURES CHANGES IN WEIGHT ARE DETERMINED BY THE CHEMICAL NATURE OF THE AGGREGATES. THE COEFFICIENT OF EXPANSION INCREASES ABOVE 800 F SINCE EXPANSION IS NO LONGER INHIBITED BY DRYING SHRINKAGE. AT 1400 F THE MODULUS OF ELASTICITY IS REDUCED TO LESS THAN HALF ITS VALUE AT 75 F, THE EXACT REDUCTION DEPENDING ON THE EXTENT TO WHICH HYDRATION HAD PROGRESSED AT THE TIME OF EXPOSURE. /PCA/

• Authors:
  • Philleo, R
• Publication Date: 0

Media Info

• Serial:
  • Portland Cement Assoc R & D Lab Bull
  • Issue Number: 0

Subject/Index Terms

• TRT Terms: Concrete; High temperature; Hydration; Modulus of elasticity; Physical properties; Thermal expansion
• Uncontrolled Terms: Concrete properties
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213541
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 97
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM