THEORETICAL CALCULATION OF VARIATIONS IN TEMPERATURE WITH TIME IN HARDENING CONCRETE POURED ON A COLD BASE IN WINTER

THE SURFACE OF ONE LAYER OF CONCRETE, POURED ON A COLD BASE DURING THE WINTER, IS THERMALLY INSULATED AGAINST THE COLD AIR. HEAT GENERATION IN THE CONCRETE IS ASSUMED TO BE UNIFORM THROUGHOUT THE LAYER AND TO DECREASE WITH TIME. WHEN THE CONCRETE IS POURED ON THE BASE, THE BOUNDARY LAYER IN CONTACT WITH THE BASE IS EXPOSED TO FREEZING. THE CONDITIONS WHICH MUST BE SATISFIED IF FREEZING IS TO BE PREVENTED ARE DESCRIBED. AN APPROXIMATE EXPRESSION IS GIVEN FOR DETERMINING THE THICKNESS OF THE FROZEN BOUNDARY LAYER IF ALL OF THE ABOVE CONDITIONS ARE NOT FULFILLED. EXAMPLES ARE GIVEN OF TEMPERATURE-TIME GRAPHS, AND RESULTS OBTAINED WITH THIS METHOD ARE COMPARED TO THOSE OBTAINED BY MEANS OF THE FINITE DIFFERENCE METHOD. /TRRL/

• Authors:
  • Claesson, J
• Publication Date: 1972

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 3-18
• Serial:
  • Nordisk Betong /Sweden/
  • Issue Number: 1

Subject/Index Terms

• TRT Terms: Cold weather construction; Concrete; Concrete construction; Finite differences; Freezing; Graphics; Heat; Temperature; Time
• Uncontrolled Terms: Graphical analysis
• Subject Areas: Construction; Highways;

Filing Info

• Accession Number: 00215748
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: Dec 18 1972 12:00AM