For concrete produced in a commercial ready mix operation, the compressive strengths were fitted to Weibull and normal distributions. It was found that the Weibull distribution successfully describes concrete compressive strength failure data. This information is useful in the theoretical description of concrete failure. Furthermore, based on chi-squared, Anderson–Darling and Kolmogorov-Smirnov goodness-of-fit tests, the difference between the Weibull and normal distribution is not large enough to make a clear distinction regarding which distribution definitively fits the experimental data better. Key words: compressive strength, normal distribution, Weibull distribution, goodness-of-fit.
The cement efficiency or reactivity of two type GU cements sold in the southern Ontario market was studied using compressive strength measurements of concrete coupled with Abram's Law. At 28 days, it was found that there was a marked performance difference between the two cements. For example, at 28 days, the cement efficiencies were 0.0889 and 0.0953 MPa·kg 1. The difference in cement efficiency was related somewhat to cement fineness. It was observed that the 28 day mortar strengths represented a good predictor of the relative efficiencies of the cement.Key words: cement, concrete, compressive strength, reactivity, efficiency.
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