Influence of hybrid fibres on the post crack performance of high strength concrete: Part I experimental investigations

This paper discusses the experimental results of tests carried out on the flexural properties of various fibre-reinforced concretes at low volume fractions of fibres upto 0.5%. The flexural properties, namely flexural strength, toughness, and ductility, were measured using four point bending tests on beam specimens. Compared to reference concrete without fibres, fibre addition was seen to enhance the pre-peak as well as post-peak region of the load-deflection curve significantly. The best flexural performance was obtained at the highest volume fraction of 0.5%. At this volume fraction, flexural toughness and ductility of hybrid fibre concretes (incorporating a blend of steel and non-metallic fibres) were comparable to steel fibre concretes. Increased fibre availability in the hybrid fibre systems (due to the lower densities of non-metallic fibres), in addition to the ability of non-metallic fibres of bridging smaller micro cracks, are suggested as the reasons for the enhancement in flexural properties.

• Record URL:
  • http://www.academicjournals.org/JCECT/PDF/Pdf2011/July/Sivakumar.pdf
• 
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/21412634
• Supplemental Notes:
  • Abstract reprinted with permission of Academic Journals.
• Authors:
  • Sivakumar, A
• Publication Date: 2011-7

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: pp 147-159
• Serial:
  • Journal of Civil Engineering and Construction Technology
  • Volume: 2
  • Issue Number: 7
  • Publisher: Academic Journals
  • ISSN: 2141-2634
  • Serial URL: http://www.academicjournals.org/JCECT/index.htm

Subject/Index Terms

• TRT Terms: Admixtures; Deflection tests; Fiber reinforced concrete; Flexural strength; Materials tests; Tensile strength; Toughness
• Subject Areas: Bridges and other structures; Construction; Materials; I32: Concrete; I50: Construction and Supervision of Construction;

Filing Info

• Accession Number: 01361688
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 31 2012 7:22AM