STRENGTH GAIN AND TEMPERATURE EFFECTS

The article attempts to clarify the extent to which temperature affects strength characteristics dealing with the influence of placing temperature and curing temperatures. Methods of temperature alteration and control are also discussed. Conditions of the early thermal state can influence future strength values - the greater the initial temperature, the greater the rate of hydration, similarly the higher the curing temperature the higher the early compressive strength characteristics - this is subsequently offset by lower long-term strength potential. Care is needed in raising the temperature of concrete after placement and compaction to minimise the risk of thermal disruption due to variations in the thermal response of the different components. Active cooling of concrete in hot weather suppresses initial hydratation rates which could otherwise lead to losses of long-term strength potential. Pre-cooled mixing water can be used or cast-in pipes can be used to circulate a cooling medium. The exothermic nature of cement hydration makes increasing temperatures possible merely by efficient insulation. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/05490219
• Corporate Authors:

  Concrete Publications Limited

  Securities House, 126 the Terrace
  Wellington,   New Zealand 
• Publication Date: 1983-7

Media Info

• Features: Figures; References;
• Pagination: p. 3-7
• Serial:
  • NEW ZEALAND CONCRETE CONSTRUCTION
  • Volume: 27
  • Publisher: CEMENT & CONCRETE ASSOCIATION OF NEW ZEALAND
  • ISSN: 0549-0219

Subject/Index Terms

• TRT Terms: Age; Cement; Compression; Compressive strength; Concrete; Concrete curing; Concrete placing; Cooling; Electric insulating materials; Heat; Hydration; Insulating materials; Strength of materials; Surveillance; Temperature; Tests
• Uncontrolled Terms: Concrete strength; Laying; Modifications
• ITRD Terms: 1757: Age; 5532: Compression; 4755: Concrete; 6711: Cooling (mater); 4702: Curing (concrete); 6743: Heat; 7195: Hydration; 6914: Insulation; 3623: Laying; 9048: Modification; 5544: Strength (mater); 9101: Surveillance; 6722: Temperature; 6255: Test
• Subject Areas: Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00382099
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Apr 30 1984 12:00AM