PULL OUT PROCESSES IN STEEL FIBRE REINFORCED CEMENT

The physical processes taking place during the pull-out of steel fibres of various geometries from portland cement paste were studied microscopically by in-situ testing. Two types of specimens were tested: (a) compact tension specimens reinforced with a single short fibre placed in front and perpendicular to cast-in notch, and specimens of a simple pull-out test geometry. Observations by optical microscopy and by SEM indicated that the pull-out processes observed in the compact tension specimen, after it was cracked and the fibre bridged across the crack, were different from those in the simple pull-out test; they showed considerable local bending along the fibres, especially when they were of a geometry containing hooks and ribs. In all types of fibres, the pull-out process observed in the compact tension specimen was non-symmetrical, since the crack induced in the matrix was shifted and subdivided as it crossed the fibre. This is in contrast to the symmetric geometry of the simple pull-out test. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02625075
• Corporate Authors:

  Construction Press

  Longman House, Burnt Mill
  Harlow, Essex CM20 2JE,   England 
• Authors:
  • Bentur, A
  • Mindess, S
  • Diamond, S
• Publication Date: 1985-2

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 29-37
• Serial:
  • International Journal of Cement Composites and Lightweight Concrete
  • Volume: 7
  • Issue Number: 1
  • Publisher: Longman Group UK Limited
  • ISSN: 0262-5075

Subject/Index Terms

• TRT Terms: Adhesion; Cement; Cement paste; Concrete; Cracking; Failure; Fibers; Friction; Material reinforcement; Microscopes; Portland cement; Pull out test; Reinforcing materials; Shear strength; Specimens; Steel; Strength of materials; Test procedures
• ITRD Terms: 5942: Adhesion; 4767: Cement paste; 4755: Concrete; 5211: Cracking; 5520: Failure; 4557: Fibre; 5452: Friction; 6790: Microscope; 6259: Pull out test; 3471: Reinforcement (in mater); 5531: Shear; 4542: Steel; 5544: Strength (mater); 6288: Test method
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00396228
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jan 31 1986 12:00AM