STRENGTH APPRAISAL OF FIBER REINFORCED CONCRETE BY REPLACING 40% OF ORDINARY PORTLAND CEMENT (OPC) WITH MINERAL ADMIXTURES FLY ASH, GGBS AND METAKAOLINE

Day by day, the Concrete consumption is increasing world over. Ever increasing cost of Cement, the main ingredient of concrete, is on one side and depletion of natural resources like Lime Stone (to manufacture Cement), Coarse and fine Aggregates on other side over the Globe is compelling to think for alternatives.. Added to this, undesirable scenario of ever increasing emission of Green house gases like Carbon Dioxide (CO2) due to production of Ordinary Portland Cement OPC) is resulting in to an alarming state of Global Warming; every one Ton of Cement Production generates one Ton of CO2. Further, in the production of Thermal Power, Tons and Tons of Coal is Burnt leading to a bi-product called Fly Ash whose disposal has become a gigantic problem world over. It is in this context, the present experimental investigation is aimed to dispose the industrial wastes like Fly Ash and Ground Granulated Blast Furness Slag (GGBS) to some extent and to reduce the emission of CO2 by consuming less OPC in manufacturing of Concrete meant for Building Construction and other Infrastructure Projects and Developmental Works. Experiments conducted on concrete made with 60% OPC + 40%mineral admixtures + 0.5% or 1% Fibers with 3 combinations:  60% OPC + 20% FA + 20% GGBS  60% OPC + 20% FA + 20% Metakaoline  60% OPC + 20% Metakaoline + 20% GGBS However, the maximum compressive strength and split tensile strength of concrete at 28 days is observed for the mix with OPC replaced by mineral admixtures 20% Fly ash + 20% GGBS @1.0% glass fibers as 9 % and 33% respectively. Replacement shall result about 20 to 25% economy in production of Concrete and retard the rate of global warming as well as the depletion of natural resources