High performance repairing of reinforced concrete structures

I. Iskhakov, Y. Ribakov, K. Holschemacher, T. Mueller

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


Steel fibered high strength concrete (SFHSC) is an effective material that can be used for repairing concrete elements. Design of normal strength concrete (NSC) elements that should be repaired using SFHSC can be based on general concepts for design of two-layer beams, consisting of SFHSC in the compressed zone and NSC without fibers in the tensile zone. It was previously reported that such elements are effective when their section carries rather large bending moments. Steel fibers, added to high strength concrete, increase its ultimate deformations due to the additional energy dissipation potential contributed by fibers. When changing the fibers' content, a required ductility level of the repaired element can be achieved. Providing proper ductility is important for design of structures to dynamic loadings. The current study discusses experimental results that form a basis for finding optimal fiber content, yielding the highest Poisson coefficient and ductility of the repaired elements' sections. Some technological issues as well as distribution of fibers in the cross section of two-layer bending elements are investigated. The experimental results, obtained in the frame of this study, form a basis for general technological provisions, related to repairing of NSC beams and slabs, using SFHSC.

Original languageEnglish
Pages (from-to)216-222
Number of pages7
JournalMaterials and Design
StatePublished - 2013


  • Ductility
  • Energy dissipation potential
  • Repairing
  • Steel fibered high strength concrete
  • Two-layer beams


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