• A.Oorkalan

The present experimental investigation is to study properties of hybrid fibre reinforced concrete. The concrete composite comprises of steel and polypropylene fibres in different % and partial replacement of cement by 40 % by weight. Concrete specimens were made with steel and polyprolene fibres in different proportions. Steel fibres varied from 0.5% and 1% by volume of concrete and polyprolene fibres from 0.25% and 0.5% by volume of concrete. Cement IS replaced with fly ash at 20% and rice husk ash at 20% by weight of cement. Specimens are tested for 28 days and 56 days and strength of hybrid fibre reinforced concrete were studied. Based on the test control specimens who contain cement replacement materials and no fibres, it was found that maximum compressive strength and split tensile strength of concrete is achieved with a optimum steel fibre content of 1 % and polypropylene fibre content of 0.5 %. Thus the fibres used in hybrid form increased the compressive strength and split tensile strength of concrete significantly than individually in the same concrete. The test results reveal that the increase in the compressive strength was found to vary between 1.43% to 51.72% in 28 days and the strength was found to vary between 22.87 % to 57.35% than the control concrete in 56 days and increase in the split tensile strength was found to vary between 1.56 % to 62.5% in 28 days and the strength was found to vary between 2.37% to 77.45% than the control concrete in 56 day

hybrid fibre, polyproplene, steel fibre, compressive strength and tensile strength

"STUDY ON HYBRID FIBRE REINFORCED CONCRETE WITH PARTIAL REPLACEMENT OF CEMENT WITH FLY ASH AND RICE HUSK ASH", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 11, page no.27-32, November-2018, Available :http://www.jetir.org/papers/JETIR1811505.pdf

"STUDY ON HYBRID FIBRE REINFORCED CONCRETE WITH PARTIAL REPLACEMENT OF CEMENT WITH FLY ASH AND RICE HUSK ASH", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 11, page no. pp27-32, November-2018, Available at : http://www.jetir.org/papers/JETIR1811505.pdf