Question

Why air-dried sample is used in Sieve analysis?​

Answer 1

To avoid lumps of small particles and clogging of the finer sieves, the soil should be air-dried before sifting.

What is Sieve analysis:

• Before using sieves, make sure they're clean.

• The actual sieving might be done by hand or with a sieve shaker, as in modern laboratories.

• To evaluate the findings of sieve analysis of soil, grading curves with the ordinates reflecting cumulative percentage passing and the abscissa of the sieve opening on a logarithmic scale can be produced.

• These curves can be used to determine whether a sample's grading adheres to the specification or is too coarse or fine, or is deficient in a certain size.