MICROCRACKING OF HIGH AND NORMAL STRENGTH CONCRETES UNDER SHORT- AND LONG-TERM LOADINGS

The effects of both monotonic and sustained uniaxial compressive stresses on the relationships among microcracking, strength, and deformation of high-strength concrete were studied using x-ray techniques and compared with those of low and medium strength comcretes. The formation, propagation, and stability of microcracks and their contribution to the failure of concrete under both types of loadings are examined and discussed. The stress levels investigated ranged from 40 to 95% of ultimate for the three materials. High-strength concrete showed significntly smaller amounts of cracking at all stress levels than normal strength concretes. As a result, lesser inelastic deformations and higher creep-stress linearity limits were associated with the former rather than with the others.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • Smadi, Mohammad M
  • SLATE, F O
• Publication Date: 1989-3

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 117-127
• Serial:
  • ACI Materials Journal
  • Volume: 86
  • Issue Number: 2
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Concrete; Creep; Deformation; Failure; High strength concrete; Loads; Microcracking; Stress tests (Equipment); Stresses; X ray analysis
• Old TRIS Terms: Concrete creep; X ray stress analysis
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00484075
• Record Type: Publication
• Report/Paper Numbers: Title No. 86-M10
• Files: TRIS
• Created Date: May 31 1989 12:00AM