Abstract—The paper presents results of an investigation conducted to study the compressive strength, split tensile strength and flexural strength of Hybrid Steel Fibre Reinforced Concrete (HySFRC). Steel fibres of different lengths, i.e., 12.5 mm, 25 mm and 50 mm having constant diameter of 0.6 mm were systematically combined in different mix proportions to obtain binary and ternary combinations. Mixes with no fibres and containing mono, binary, ternary steel fibres were also cast for comparison purpose. Three fibre volume fractions were used 0.5%, 1.0% and 1.5%. A total number of 132 cube specimens of size 100 x 100 x 100 mm and 63 prisms specimens of size 100 x 100 x 500 mm were tested for compressive strength, split tensile strength and flexural strength respectively. It has been observed that a fibre combination of 33% 12.5 mm + 33% 25 mm + 33% 50 mm, long fibres can be adjudged as the most appropriate combination to be employed in HySFRC for compressive strength, split tensile strength and flexural strength. 

Index Terms—fibre reinforced concrete, steel fibre reinforced concrete, HySFRC, flexural strength

Cite: M P Singh, S P Singh, and A P Singh, "Strength Development of Hybrid Steel Fibre Reinforced Concrete," International Journal of Structural and Civil Engineering Research, Vol. 2, No. 4, pp. 175-183, November 2013.