Advances in concrete construction

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An experimental and analytical study into the strength of hooked-end steel fiber reinforced HVFA concrete

  • Shariq, M. (Department of Civil Engineering, Z.H. College of Engineering and Technology, Aligarh Muslim University) ;
  • Pal, S. (Department of Civil Engineering, Delhi Technological University) ;
  • Chaubey, R. (Department of Civil Engineering, Gautam Budh University) ;
  • Masood, A. (Department of Civil Engineering, Z.H. College of Engineering and Technology, Aligarh Muslim University)
  • Received : 2020.04.08
  • Accepted : 2021.12.28
  • Published : 2022.01.25
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Abstract

The experimental investigations into hooked-end round steel fibers (HSF) effect on the age-dependent strengths of high volume fly ash (HVFA) concrete is studied. The concrete was prepared with class F fly ash used as partial cement replacement varied from 0% to 70% on an equal weight basis. Two percentages of HSF (i.e., 0.5% and 1.5% by volume fraction) of 50 mm length were added in plain, and 50% fly ash concrete mixes. The compressive and flexural tensile strength was determined at 7, 28, 56, and 90 days. The strength results of fly ash concrete mixes with and without steel fibers were compared with the plain concrete strength. The test results indicated that the strength of fly ash concrete is comparable with the plain concrete strength and further increases with an increase in the percentage of steel fibers. The maximum flexure strength of HVFA concrete is found with 0.5% steel fibers. It is concluded that the HVFA concrete with steel fibers of 50 mm length can effectively be used in concrete construction. The analytical models are proposed to predict the age-dependent compressive and flexural tensile strength of HVFA concrete with and without HSF. The compressive and tensile strength of HVFA concrete with HSF can be predicted using these models when the 28-day compressive strength of plain concrete is known. The present study will be helpful in the design and construction of reinforced and pre-stressed concrete structures made with HVFA and HSF.

Keywords

References

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