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Mar 8, 2013

What is uniformity coefficient and what is its significance?

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    Apr 14, 2013

    The uniformity coefficient of sand is defined as a ratio: the size at which 60 percent (by weight) of a sand sample passes through a sieve (in other words 60 percent of the sand is finer than a given size) divided by the size at which 10 percent of the same sample (by weight) passes through a sieve (10 percent is finer than a given size). A uniformity coefficient of less than 2 indicates the grains of sand are suitable for use in a slow sand filter. As the number goes up the size differentiation becomes greater and the quality of the sand becomes less desirable for use in a slow sand filter

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