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Abstract-Flyash is a waste product which is generated in thermal power stations. The quantity of fly ash produced from thermal power plants in India is approximately 250 million tons each year, and its percentage utilization is less than 13%. Majority of fly ash produced is of Class F type. The use of these materials would reduce the disposal problems now faced by the thermal power stations and industrial plants. During the last few years, some cement companies have started using fly ash in manufacturing cement, known as 'Pozzolana Portland cement', but the overall percentage utilization remains very low, and most of the fly ash is dumped at landfills. Fine aggregate is natural resource in nature and to meet the demand of concrete in construction we are exploiting it gradually. Here concrete is made by using flyash as replacement to sand. In this way can save the natural resource by reducing its usage by using alternative product. Fly ash is generally used as replacement of cement, as an admixture in concrete, and in manufacturing of cement. Concrete containing fly ash as partial to complete replacement of fine aggregate will improve its strength on long-term basis. In this investigation fly ash is used as sand replacement material. The material mix of proportion 1:1.58:3.2 each category comprises of various percentages of sand replacement material in increasing order i.e. 25%, 50%, 75%, and 100%. In addition to this crimped steel fiber of 1% and 2% is incorporated for concrete works. The workability is maintained constant range for all mixes. Strength characteristics such as compressive strength split tensile strength and flexural strength of concrete mixes are found out for 7, 14 and 28 days curing period and results are analyzed

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Polymers and their composites are being increasingly employed in view of their good strengths and corrosion resistance. The features that make the polymer composites in industrial applications are the opportunities to tailor their properties with special fillers. For instance, short carbon and glass fibers have been successfully employed to improve the strength and therefore the load carrying capacity of polyamide composites can also be improved Optimization of parameters is an important in the tribological process. Response surface methodology (RSM) based optimal parameter analysis was performed to investigate the change of responses like wear rate (WR) and coefficient of friction (COF) with the change of input parameters to determine optimum setting of process parameters such as normal force, sliding velocity and reinforcement for achieving minimum WR and COF. The regression model generates the response surfaces. The present study is to optimize the parameter setting for combined responses.