AN UNSOLVED MYSTERY IN CONCRETE TECHNOLOGY

This short article discusses the sensitivity of the flexural strength test for concrete to the curing history. Results are presented geographically for concrete specimens aged from 14 to 364 days, cured in and tested under different conditions. The shrinkage stress theory is suggested as the explanation for low initial flexural strength for specimens cured in air after 7 days and tested dry. Mystery surrounds the loss of flexural strength in specimens after 28 days, which have been cured (after 7 days) in air and tested wet. It appears that absorption of water has a different effect at the age of one year than it has at the age of one month. The effect of using different coarse aggregate in the concrete also produces results opposite to those expected. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00105317
• Corporate Authors:

  Cement and Concrete Association

  Wexham Spring
  Slough SL3 6PL, Buckinghamshire,   England 
• Authors:
  • Keene, P
• Publication Date: 1979-11

Media Info

• Features: Figures; References;
• Pagination: p. 31
• Serial:
  • CONCRETE
  • Volume: 13
  • Issue Number: 11
  • Publisher: THE CONCRETE SOCIETY
  • ISSN: 0010-5317

Subject/Index Terms

• TRT Terms: Absorption; Aggregates; Bending stress; Coarse aggregates; Concrete; Concrete curing; Flexural strength; Flexure; Shrinkage; Strength of materials; Test procedures; Time; Water
• ITRD Terms: 4577: Aggregate; 4755: Concrete; 4702: Curing (concrete); 5586: Deflection; 4743: Shrinkage; 5544: Strength (mater); 6288: Test method; 5414: Time
• Subject Areas: Geotechnology; Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00308821
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Apr 22 1980 12:00AM