Flexural behavior of concrete beams reinforced with high volume steel fibers

Khaloo, A ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.3850/978-981-07-5354-2-St-114-350
  3. Publisher: 2013
  4. Abstract:
  5. This paper presents the results of an experimental study on the flexural behavior of ten 10 × 15 × 120 (cm) steel reinforced high strength concrete beams under deflection control loading conditions. Test variable includes volumetric percentage of steel fibers (0%, 1.5%, 3%, 4%, 5%). The plain concrete strength was 30MPa. The monotonic concentrated load was applied at the center of the beam, the relative deflection was measured, and demec points were used to determine curvature of the beam. Load-deflection and moment-curvature diagrams have been obtained and plotted for each beam individually. Test results indicate that higher fiber content considerably improves flexural behavior and provides higher energy absorption and ductility. It also demonstrates that ultimate load carrying capacity of the beam with high volume fiber, could reach three times of the plain concrete specimen and the energy absorption improve up to 30 times. Based on the observation during concrete mixing and casting, for fiber content above 3 percent, mixing and producing homogenous reinforced concrete even with proper and high volume of superplasticizer becomes extremely difficult
  6. Keywords:
  7. Fiber reinforced concrete ; High volume ; Concrete beams and girders ; Concrete mixing ; Concretes ; Energy absorption ; Fiber reinforced materials ; Fibers ; High performance concrete ; High strength steel ; Load limits ; Reinforced plastics ; Structural design ; Fiber-reinforced concretes ; Flexural behavior ; High volumes ; SFRC beam ; Volumetric ratio ; Steel fibers ; Beams ; Bend Strength ; Carbon Fibers ; Ductility ; Reinforced Concrete
  8. Source: ISEC 2013 - 7th International Structural Engineering and Construction Conference: New Developments in Structural Engineering and Construction ; 2013 , Pages 1031-1036 ; 9810753551 (ISBN) ; 9789810753559 (ISBN)
  9. URL: http://rpsonline.com.sg/proceedings/9789810753542/html/St-114-350.xml