What is the sieve size to be used in UCC test? IS 2720 (X) says that the maximum grain size should be less than 1/8th of the sample dia.(38 mm generally), which comes to 4.75 mm. Apart from this, is there any standard to be followed in the sieve size for this test?
I assume you mean 38 microns and not 38 mm (= 3.8 cm). Clays are small by definition. Clays typically are < 2 microns (see: https://en.wikipedia.org/wiki/Soil_texture
An introduction of soil and sediment particle size is provided in:
February 9th, 2012 Size and shape characterization in soils and sediments
https://www.brainshark.com/malvern/vu?pi=241199769&text=M021507&r3f1=
You need to read the document IS : 2720 (Part 4) 1985 that deals with grain size analysis. This gives you all the information you need.
Be careful to refer to your material as 'soil' and not as 'clay'. The two are very different!
Alan, 38mm is correct in this instance. It is the minimum cylinder diameter of the test sample, not a grain size.
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