Statistical Evaluation of Compressive Strength in High Performance Concrete (HPC) with Steel Fiber Addition
In this study, statistical analysis of High performance concrete (HPC) with steel fiber addition at 0.50, 0.75, 1.00, 1.25, & 1.50 % was evaluated each with a sample size (N) of 50 using 100 mm side cubes. Normality test and screening was done on the data set, frequency histogram with superimposed normal distribution curve plotted, as well as P-value compared with the significance level. Other parameters investigated were confidence interval and probability plot. It was seen that the data does not follow the normal distribution because the data float around the ideal normal curve, P-value is less than the significance level and Anderson-darling is high. An attempt was made to transform the data set for Goodness of fit using Johnson Transformation, and it was seen that the P-value significantly improved. Overall, an improvement in the mean compressive strength is observed with increase in fiber addition by utilizing large sample size.
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