A HOLOGRAPHIC REAL TIME STUDY OF CRACK PROPAGATION IN CONCRETE

In this paper the fracture process of concrete is studied on a microscopic level during the bending of notched specimens. A holographic technique called tv-holography is used. This allows real time observation of concrete microcracking, from the first loading until final rupture. The smallest observable crackwidth size is about 0.1 mcron. It was found that in this kind of loading, the onset of cracking takes place at about 80% of ultimate load, and that the main crack is not continuous. Further, coarse aggregate particles seemed to arrest propagating cracks and cause crack branching.(a)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Aassved Hansen, E
• Publication Date: 1989-7

Language

• English

Media Info

• Pagination: p. 611-620
• Serial:
  • Cement and Concrete Research
  • Volume: 19
  • Issue Number: 4
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Beams; Coarse aggregates; Concrete; Cracking; Deflection; Failure; Holography; Loads; Microscopes
• Uncontrolled Terms: Micro
• ITRD Terms: 3472: Beam; 4559: Coarse aggregate; 4755: Concrete; 5211: Cracking; 5586: Deflection; 5520: Failure; 6770: Holography; 5567: Load; 9045: Micro; 6790: Microscope
• Subject Areas: Geotechnology;

Filing Info

• Accession Number: 00498621
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM