The objective of the wet sieve test is
to obtain basic index information about the soil, that can be used to estimate strength
and permeability. It is the primary form of classification for
Granular soil is washed to remove fines, then dried and processed through
sieves to determine grain size distribution. Fines removed through washing are discarded,
though in other cases may be retained and processed through a hydrometer test.
grain sizes are typically divided between larger and finer than #200. The finer
material in many cases sticks to the larger particles, so washing is required to remove as
much as possible.
- Weighing inaccuracies - small samples and scale
- Relative cleanliness of smaller sieves.
- Material lost or gained from during shaking and
subsequent weighing of fractions.
cover, #4, 10, 20, 40, 100, 200, pan
Washing sieves, #200 and #4
5-gal bucket to wash into with support sticks
Pan for drying sample on the stove
Balance sensitive to 0.01 gm
Procedure and data sheets [right-click | "save target as"
Holtz, Kovaks and Sheahan (2011), section 2.5
Holtz and Kovaks (1981), pages 26-32.
Das (1998), sections 1.6 and 1.7, starting on page 18.
Gorrill (1998), pages 14-16, 54, 56.
Bowles (1986), 35-45.