THE EFFECT OF STEEL FIBERS ON THE MECHANICAL PROPERTIES OF HIGH PERFORMANCE CONCRETE

ABSTRACTThe present investigation considers the effect of steel fibers content andthe combined effect of rice husk ash (RHA) and high range water reducing agent(HRWRA) on the mechanical properties of the produced matrix. Theexperimental results showed the using steel fibers in High-performance concreteled to a considerable improvement in mechanical properties of concrete. Theresults exhibited that the addition of steel fibers to high performance concrete upto 1% with 6% (HRWRA) and 8% (RHA) as a partial replacement by weight ofcement, increases the compressive strength significantly. Also, the results showedthat the addition of 1.5% steel fibers with 6% (HRWRA) and 8% (RHA) increasesthe splitting and flexural strengths significant. At 28 days, the compressive,splitting and flexural strengths were increased to 11.57%, 63.86%, and 32.93%more than High performance concrete without steel fibers, respectively.Key words: Concrete, Mechanical properties, High performance concrete,Strength, Admixtures