FRACTURE PROPERTIES OF CONCRETE REINFORCED WITH STEEL-POLYPROPLYENE HYBRID FIBRES

This research discusses polypropylene fibres and three sizes of steel fibres reinforced concrete. The total fibre content ranges from 0% to 0.95% by volume of concrete. A four-point bending test is adopted on the notched prisms with the size of 100x100x500 cu mm to investigate the effect of hybrid fibres on crack arresting. The research results show that there is a positive synergy effect between large steel fibres and polypropylene fibres on the load bearing capacity and fracture toughness in the small displacement range. But this synergy effect disappears in the large displacement range. The large and strong steel fibre is better than soft polypropylene fibre and small steel fibre in the aspect of energy absorption capacity in the large displacement range. The static service limitation for the hybrid fibres concrete, with "a wide peak" or "multi-peaks" load-CMOD patterns, should be carefully selected. The ultimate load bearing capacity and the crack width or CMOD at this load level should be jointly considered in this case. The critical stress intensity factor and fracture toughness of proper hybrid fibre system can be higher than that of mono-fibre system. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09589465
• Corporate Authors:

  Elsevier

  The Boulevard, Langford Lane
  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • Qian, C
  • STOREVEN, P
• Publication Date: 2000

Language

• English

Media Info

• Features: References;
• Pagination: p. 343-51
• Serial:
  • Cement and Concrete Composites
  • Volume: 22
  • Issue Number: 5
  • Publisher: Elsevier
  • ISSN: 0958-9465

Subject/Index Terms

• TRT Terms: Bearing capacity; Failure; Fibers; Properties of materials; Reinforced concrete; Steel; Strength of materials
• ITRD Terms: 3085: Bearing capacity; 5520: Failure; 4557: Fibre; 5925: Properties; 4794: Reinforced concrete; 4542: Steel; 5544: Strength (mater)
• Subject Areas: Materials;

Filing Info

• Accession Number: 00799823
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Oct 6 2000 12:00AM