Fracture studies on concretes with hybrid steel fibers

Author(s): M. Arall, O. Sengul, C. Tasdemir, M.A. Tasdemir
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 547 - 559
Total Pages: 12
Language: English

Abstract: 
The main objective of this work was to provide more information on the properties of hybrid fiber reinforced concretes. Meso steel fibers, macro steel fibers and micro polypropylene fibers were used in the study. Three different steel fibers with and/or without hooked ends were added to the mixtures. The volume fraction of each steel fiber was variable, but their total volume fractions were kept constant at 2 %. Twelve concrete mixtures with or without different fibers were produced, these mixtures were; a control mixture without any fibers, a mixture produced using only polypropylene fibers, and 10 mixtures containing both steel fibers and polypropylene fibers. In all these mixtures, the volume fraction of polypropylene fiber was kept constant at 0.05 %. Partial replacement of aggregate by steel fiber was based on one to one volume basis. Compressive strength, splitting strength and modulus of elasticity of the specimens were obtained. Fracture energies were also determined. In order to determine the optimum amounts of fibers, a multi-objective simultaneous optimization technique containing desirability functions was performed.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00