Experimental Study & Strength of Concrete by Using Steel & Glass Fibers

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Concrete is the most widely utilized “manmade” material globally for construction in many developing countries in all types of civil engineering works. Also, concrete is an environmental friendly material and in areas of growing environment – related awareness that is of prime importance. Many of investigations were attempted by the researchers to improve the quality, strength and durability against adverse exposures, since decades. Portland cement concrete is considered to be a relatively brittle material. When subjected to tensile stresses, unreinforced concrete will crack and fail. Since the mid 1800's steel reinforcing has been used to overcome this problem. As a composite system, the reinforcing steel is assumed to carry all tensile loads. When fibers are added to the concrete mix, it too can add to the tensile loading capacity of the composite system. In fact, research has shown that the ultimate strength of concrete can be increased by adding fiber reinforcing. In this research paper, an attempt is made to use mixed steel and glass fibers with varying percentages of fibers from 0.5, 0.75, 1.0 percentages of total fiber content for M 25 grade structural concrete with locally available aggregates ( i.e. fine & coarse aggregates ) and Portland pozzolanic Cement ( i.e. PPC ). The details of investigation along with the analysis and discussion of the test results are reported here in.