NEUTRON RADIOGRAPHY FOR MICROCRACK STUDIES OF CONCRETE CYLINDERS SUBJECTED TO CONCENTRIC AND ECCENTRIC COMPRESSIVE LOADS

The neutron radiography technique developed for studying microcracking concrete is used to investigate the effect of various types of compressive loads on the internal cracking of concrete cylinders. This paper reports on these studies which include measurement of the incidence of microcracking in concrete cylinders as a function of concentric load and effect of eccentric loading on internal cracking. The use of the technique has shown a correlation between applied stress and the cumulative length of microcracks, as has been reported previously. The failure of a concrete cylinder loaded at a significant eccentricity is shown to be accompanied by the formation of a longitudinal crack under the load, with transverse cracks along the tension side of the specimen. These and other results are included.

• Record URL:
  http://www.concrete.org/Publications/InternationalConcreteAbstractsPortal.aspx.aspx?m=details&i=2117
• Availability:
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• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • Najjar, W S
  • Hover, K C
• Publication Date: 1989-7

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 354-359
• Serial:
  • ACI Materials Journal
  • Volume: 86
  • Issue Number: 4
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Compressive strength; Concrete; Cracking; Eccentricity; Loads; Microcracking; Radiography
• Uncontrolled Terms: Concrete cracking; Eccentric loading
• Old TRIS Terms: Concentric loading
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00486831
• Record Type: Publication
• Report/Paper Numbers: Title No. 86-M29
• Files: TRIS
• Created Date: Aug 31 1989 12:00AM