1. What is \"Wet sieving\"? When and why it is used instead of dry sieving? Per
ID: 1732691 • Letter: 1
Question
1. What is "Wet sieving"? When and why it is used instead of dry sieving? Per the sieve test result, classify the soil in accordance to Unified Soil Classification System (USCS). Do you enough information? Show your 2. calculation if needed 3. Sketch three grain-size distribution curves, representing three different types of soils: 1) Well- raded, 2) uniformly-graded, and 3) gap-graded. hich type of soil that you sieved belong to? 4. Why is the sieve analysis is not used for clay soil, and the hydrometer analysis is not used for sand? According to ASTM D422, hydrometer test should test on soil passing Sieve No. 200? Why we were 5. using soil passing Šieve No. 40 for this Lab exercise?Explanation / Answer
Answer for 1.
In simple words, Wet sieving is a procedure which is used to evaluate particle size distribution of a granular material.
Most sieve analyses are carried out dry. But there are some applications which can only be carried out by wet sieving. So, the main situations where wet seiving is adopted instead of dry seiving are as follows:
1. When the sample is a very fine powder which tends to assemble (mostly < 45 µm) – in a dry sieving process this nature would lead to a clogging of the sieve mesh and which may tends to make a further sieving process next to impossible.
2. Also, it can be used to remove fines of materials that may be difficult to sieve, prior to drying and testing a sample.
3. If dry sieving can’t produce an acceptable degree of separation between the individual fractions.
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