Soils Lab 1

Soils Lab 1 - Brendan McKeon 2/2/10 Soil Mech: Ling...

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Brendan McKeon 2/2/10 Soil Mech: Ling Experiment 1: Particle Size Analysis – Mechanical Sieve Method Purpose The index properties of soils are vital information necessary for geotechnical engineers to classify soils. One of the most common index properties of soils is grain size distribution. In this first lab we will analyze the particle size by mechanical sieve method. From this analysis we can determine the classification of the soil using the Unified Soil Classification System. Procedure We weigh a sample of dried soil. Then the sample is put into a coarse, #4 sieve and shaken over a piece of parchment paper. The soil particles that are smaller than the sieve opening size pass through onto the parchment paper. Once the flow of soil from the bottom of the sieve diminishes substantially the weight of the soil that is left in the sieve is measured. The soil that passed through the sieve, which fell onto the parchment paper, is funneled from the paper into a finer sieve. This procedure is repeated for a #10 sieve, a #30 sieve, a #100 sieve, and finally a # 200 sieve. For the last sieve the soil particles were so small that static friction prevented them from passing through the sieve when they
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Soils Lab 1 - Brendan McKeon 2/2/10 Soil Mech: Ling...

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