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Investigation of the Fracture Properties of Self Compacting Concrete Containing Steel Fibers

Golsorkhtabar Amiri, Hadi | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48019 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Kazemi, Mohammad Taghi
  7. Abstract:
  8. Self-Compacting Concrete (SCC), a new generation of concrete that are used in different applications. This concrete is compressed without external energy, under its own weight. This study investigating the fracture properties of self-compacting concrete containing steel fibers. For this purpose, steel fibers with different percentages are added to SCC. Also samples with different water to cement ratio and different maximum aggregate size were made and their impact on the fracture parameters of self-compacting concrete containing steel fibers were investigated. In order to achieve the desired objectives in this study, two different methods are used according to RILEM standards which include work of fracture method based on cohesive crack model and size effect method based on effective elastic crack. According to the methods, With doing three-point bending tests on notched beams in terms of mid-span displacement control, parameters such as fracture energy, characteristic length and other fracture properties can be achieved. The results showed that steel fibers significantly increase the fracture energy and improved other fracture parameters. In WFM, with increase of steel fibers up to 1.6%, GF increased 21 times and in SEM method with increase of steel fibers up to 0.4%, Gf increased 2.4 times. Also, by decrease of water to cement ratio and increase of maximum size of aggregate, fracture energy increased in both methods
  9. Keywords:
  10. Self Compacting Concrete (SCC) ; Fracture Mechanics ; Steel Fibers ; Size Effect ; Fracture Work Method

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