In the Sieve Analysis for determining the average grain size (grain fineness number), the mesh number of the pan just above the pan being considered is used as the multiplication factor. This is because the sand collected in a particular sieve has the size corresponding to the Sieve just above it. However, this rule is not followed for the first few sieves as well as for the pan. What is the reason?
Answers
Explanation:
A sieve analysis (or gradation test) is a practice or procedure used (commonly used in civil engineering) to assess the particle size distribution (also called gradation) of a granular material by allowing the material to pass through a series of sieves of progressively smaller mesh size and weighing the amount of material that is stopped by each sieve as a fraction of the whole mass.The size distribution is often of critical importance to the way the material performs in use. A sieve analysis can be performed on any type of non-organic or organic granular materials including sands, crushed rock, clays, granite, feldspars, coal, soil, a wide range of manufactured powders, grain and seeds, down to a minimum size depending on the exact method. Being such a simple technique of particle sizing, it is probably the most common.