# How to check Sand Quality at Site/ Field?

### What is Sand and how to check is quality before using at site?

#### What is Sand?

It is a building material, and sand is a granular material blanketing the beaches, riverbeds and deserts.

There are some field test for find quality of sand.

#### Test For Bulking Of Sand

• Take 250 ml. glass cylinder.
• Fill up with damp sand up to the 200 ml. mark.
• Slowly pour some water. The sand settles to its actual volume which is less than 200 ml. Mark this level. Let us assume that it is D ml.
• Then Bulkage is calculated by using the formula

% Bulkage =  {(200-D)/D} x 100

• This bulking of sand should be known for proper correction to be applied when calculating dry sand requirement.

Silt Content Of Sand

• Take a clean 200 ml. measuring cylinder.
• Fill it with sand up to certain mark (say the reading is X). Add water above it up to 200 ml. and shake well.
• Allow a period of 2 hours for settlement.
• For fast result we can use salt into it.
• Clean sand will settle at the bottom with silt and clay impurities on top of the sand layer.
• Now observe the top level reading for sand. Assume that it is Y. Then the silt contain in % is given by

% silt content = {(X-Y)/X} x 100

Total silt content should not be more than 7% for good quality sand.