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Fracture properties of steel fiber reinforced high strength concrete using work of fracture and size effect methods

Kazemi, M. T ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1016/j.conbuildmat.2017.03.089
  3. Publisher: Elsevier Ltd , 2017
  4. Abstract:
  5. This paper deals with investigation of fracture behavior of steel fiber reinforced high strength concrete (SFRHSC) and compare it to plain high strength concrete (HSC). Based on an experimental program, a series of three point bending tests were carried out on 54 notched beams, as recommended by RILEM. The fracture parameters were measured by two methods: work of fracture method (WFM) and size effect method (SEM). Then the fracture parameters obtained from these two methods were compared. The results showed that with increase of steel fibers, fracture energy of GF in WFM and Gf in SEM increase but this increase in work of fracture method is more significant. The effective size of the process zone (cf) and the characteristic length (Lch) increase with increase of steel fibers, which indicates that the HSC becomes more ductile by introducing fibers. The accuracy of the fracture parameters obtained from the SEM for SFRHSC is acceptable for low steel fiber volume fractions. Also, GF/Gf ratio increased from about 2.5 for the HSC to around 10.5 for the SFRHSC. © 2017 Elsevier Ltd
  6. Keywords:
  7. Fracture energy ; High-strength concrete ; Steel fiber ; Toughness ; Bending tests ; Concretes ; Fibers ; Fracture ; Fracture mechanics ; High performance concrete ; High strength steel ; Reinforced concrete ; Reinforcement ; Software testing ; Steel fibers ; Characteristic length ; Experimental program ; Fiber volume fractions ; Fracture behavior ; Fracture parameter ; High strength concretes ; Steel fiber reinforced high strength concrete ; Three-point bending test ; Brittle fracture
  8. Source: Construction and Building Materials ; Volume 142 , 2017 , Pages 482-489 ; 09500618 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0950061817304646