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We provide the Fineness Modulus test for sand, a key indicator of particle size distribution. This test involves performing a sieve analysis with standard sieves to determine the mean size of sand particles. By calculating the cumulative percentage retained on each sieve and subtracting it from 100, we obtain the fineness modulus value. This information is essential for assessing the quality and suitability of sand in concrete mixes and other construction applications, ensuring optimal performance and durability.