Now-a-days researches are concentrating on the utilization of waste materials in construction industry. Fly ash is one of the waste originated from industrial, is the main concern in the present study for brick manufacturing. As fly-ash is a by-product, its properties may vary from source to source resulting variation in strength of the brick. To confirming this, the main focus of the present study was to fabricate a hydraulically operated semi-automatic brick pressing machine followed by preparation of fly ash brick using that and study on the variation of brick strength. Later on, a statistical analysis is conducted based on the experimental compressive strength data for the fly ash bricks. The normal distribution curves are plotted followed by the estimating the constraints of normal distribution, which is the most common adopted distribution function in concrete. From the analysis, the characteristic compressive strength at 95% probability level is obtained as 3.46 and 5.42MPa respectively for the bricks (M1 and M2 type).
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