HSFRCHigh-Strength Fiber-Reinforced Concrete
HSFRCHealth Sciences Faculty Research Committee (South Africa)
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To study the shear capacity of HSC and HSFRC beams without shear reinforcement, the parameters tensile strength of concrete, shear span to depth ratio (a/d) and tensile reinforcement ratio were taken into account in terms SIP.
The empirical shear stress values calculated from the Equation 7 and the experimental shear stress values for HSC and HSFRC beams for a/d ratio of one, two, three and four with volume fraction of fibers (0%, 0.
Based on the experimental studies conducted on HSC and HSFRC beams without web reinforcement under shear loading, the following conclusions have been drawn:
The energy absorption capacity of HSFRC elements at all a/d ratios is high when compared with conventional non fibrous concrete beams.
At the same load level, cracking stage of high-strength concrete beam with no fibres is far longer and wider than that of HSFRC and HYFRC beams.
It was noticed that the failure of HSFRC beams and HYFRC beams was not sudden, which means the mode of failure of beam was flexure mode.
40% when compared to HSFRC beam containing 100% steel fibres.
65% when compared to reference beam and 85% when compared with HSFRC beam.
The cracks of high strength concrete specimens without fibres are far longer than HSFRC and HYFRC specimens.
There is no significant improvement in compressive strength of HSFRC and HYFRC.
The flexural toughness of HSC containing fibres in hybrid form observed to have more than the HSFRC.
The cracks are more uniformly distributed in HSFRC and HYFRC specimens than the HSC specimens.