Determination of silt content in sand
Purpose : To determine the silt content in sand.
Test procedure :
Fill the jar with 100ml water.
Add to it 3 – 4 tablets of NaOH and prepare NaOH solution.
Add sample of sand in the measuring jar up to height of 100ml approximately.
Fill the jar with additional 100ml water.
Stir the contents in the jar thoroughly and allow it to settle for 10 – 15 minutes.
Measure the height of sand layer (d1) and height of silt layer (d2) in the jar.
Silt content (%) = d 2 / d 1 x 100
Note: In case of no availability of NaOH, only water is used in the test and the soil solution is allowed to settle for 2 – 3 hours.