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Behavior Investigation of Self-compacting Concrete (SCC) Beams Reinforced by Steel Fibers

Molaei Raisi, Elias | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44735 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Khaloo, Alireza
  7. Abstract:
  8. In the recent decades, self-compacting concrete (SCC) has been introduced as high workable concrete that under its own weight and without any impact or vibration fills the framework. Using fibers in concrete was attended by engineers and researchers for decades. These days, fibers were used in bridges, beams, columns, dams, retaining walls and sidewalk. Steel fibers reduce the low tensile strength of concrete and also by bridging between the cracks the absorbed energy of concrete has been increased. Concrete elements can also resist much load, especially impact and explosion load by reinforcing with steel fibers. In past, a lot of researches about using fibers in concrete have been conducted. On the other hand, study on self-compacting concrete beams reinforced with fibers has not been investigated. Using fibers in SCC reduces the workability of SCC, so the maximum amount of fibers should be restricted. Super plasticizers can increase the workability of SCC when fibers are utilized.
    In this thesis, for obtaining the rheological and mechanical properties of SCC, five steel fibers volume fractions (0, 0.5, 1, 1.5 and 2) were used. Rheological properties were determined through slump flow time and diameter, L-box, J-ring, and V-funnel flow time tests.The dimensions of beam specimens are 100×140×1200 mm and they were used for absorbed energy and load-deflectiontests. Compressive strength and splitting tensile strength were obtained by cylindrical specimens with dimensions of 150×300 mm. Two different compressive strengths for each fibers volume fraction were made and effect of which was investigated
  9. Keywords:
  10. Self Compacting Concrete (SCC) ; Steel Fibers ; Concrete Workability ; Mechanical Properties ; Fibers Reinforced Beam

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