Effect of Notch/Depth Ratio on Fracture Behavior of Plain Concrete

An experimental investigation on the influence of pre-crack depth, maximum aggregate and specimen size on the fracture behavior of concrete is presented in this paper. Over 200 specimens were tested in the quasi-static cyclic mode of testing. Four different sizes of wedge-splitting concrete specimens were prepared with dimensions varying from (width x total depth x thickness) 210 x 210 x 25 mm to 1680 x 1680 x 200 mm and five different maximum aggregate sizes of 4.75, 9.5, 1`9, 38 and 76 mm and initial notch/depth ratios of 0.15 and 0.30. Generally, the values associated with the peak load, and toughness (R-curves) were noticeably lower for the long-notch specimens than those of short-notch specimens. The crack trajectory deviated more from the rectilinear path in the specimens with larger aggregate size and the deviation in short-notch specimens was noticeably more than that in long-notch specimens. For same size specimens, an increase in aggregate size resulted in an increase in crack mouth opening displacement (CMOD) and it was more pronounced in short-notch specimens than in long-notch specimens. Less energy absorption in the fracture zone was observed in long-notch specimens than in short-notch specimens that can be characterized by the crack surface interaction (friction).

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0727732471
• Corporate Authors:

  Thomas Telford Limited

  London,   United Kingdom 
• Authors:
  • Issa, M A
  • Chudnovsky, A
  • Isla, M
  • Issa, M
• Conference:
  • Proceeding of the International Symposium Dedicated to Professor Surendra Shah, Northwestern University, USA
  • Location: Dundee Scotland, United Kingdom
  • Date: 2003-9-3 to 2003-9-4
• Publication Date: 2003

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 27-36
• Monograph Title: Role of Concrete in Sustainable Development

Subject/Index Terms

• TRT Terms: Aggregates; Behavior; Concrete; Cracking of concrete pavements; Depth; Energy; Fracture properties; Fracture tests; Notch tests; Specimens; Toughness
• Subject Areas: Energy; Geotechnology; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01010847
• Record Type: Publication
• ISBN: 0727732471
• Files: TRIS
• Created Date: Nov 30 2005 7:26AM