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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: The Fineness Modulus and Its Dispersion Index
Author(s): Philippe Lecompte
Publication: Journal Proceedings
Appears on pages(s): 474-480
Keywords: fine aggregates; fineness modulus;quality control; sands; sieve analysis; standard deviation; statistical analysis.
Abstract:Concrete sand grading is statistically analyzed. The width of each sieve opening of the different sieves is considered as the cell boundaries and the percentages by weight of sand retained on successive sieves, as the frequencies. The sand frequencies are normal log distributed. The fineness modulus is a logarithmic function of the geometric mean of the particle size. The dispersion index is a logarithmic function of the geometric dispersion. An analysis of variance of the fineness modulus and the dispersion index has been made to establish a sampling experiment.
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