Particle-Size Analysis of Soils ASTM D422
Particle-Size Analysis of Soils ASTM D422 GRAIN SIZE ANALYSIS SIEVE & HYDROMETER ANALYSIS Purpose : This test is performed to determine the percentage of different grain sizes contained within a soil. The mechanical or sieve analysis is performed to determine the distribution of the coarser, larger-sized particles, and the hydrometer method is used to determine the distribution of the finer particles. Standard Reference : ASTM D 422 - Standard Test Method for Particle-Size Analysis of Soils Significance : The distribution of different grain sizes affects the engineering properties of soil. Grain size analysis provides the grain size distribution, and it is required in classifying the soil. Equipment : Balance, Set of sieves, Cleaning brush, Sieve shaker, Mixer (blender), 152H Hydrometer, Sedimentation cylinder, Control cylinder, Thermometer, Beaker, Timing device. Test Procedure: Sieve Analysis: (1) Write down the weight of each sieve as
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