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The natural fibrous materials which are effective in purification purpose has been identified and used for domestic purification. The materials used as a filter bed in this study are Sisal fiber, Areca husk fiber activated carbon and river sand. The removal efficiency of these materials has been studied by setting the filter bed for different contact period. Influent greywater sample (raw water) and effluent greywater smaple (treated water) collected and analyzed for pH, TDS, TSS, TH, BOD, COD, oil and grease, chloride and sulphate in the laboratory and compared with THPCB and WHO standards. The removal efficiency of this parameter is between 0 to 25 are 12.5% (TDS), between 30 to 40 are 50% (TH, BOD, COD, sulphate) and 40 to 50 are 25% (TSS, oil and grease) and above 50 are 12.5% (Chloride).

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S Cement Concrete is one of the most important material used in construction, as it provides good ductility and can be moulded into any shape. Normal cement concrete holds a very short tensile strength, limited ductility and little resistance to cracking. It has been initiated that various types of fibers added in exact percentage to concrete expands the mechanical properties, durability and serviceability of the structure. The main aim of the study is to study the strength of M20 grade of concrete by adding rice husk ash and barite comparing with conventional concrete. The admixtures are added from replacing cement with fly ash and GGBS at 25%, 50% & 75% to the volume of cementious material. The mechanical properties namely compressive strength, split tensile strength were carried for concrete specimen at different age level and the basic test was conducted for cement, coarse aggregate and fine aggregate.

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