لخّصلي

1.Transfer soil-Calgon mixture from flask to a hydrometer jar.Insert the plunger into the graduated cylinder and gently mix the soil until a uniform suspension is obtained (at least 30 seconds).As soon as you remove the plunger, check the exact time, record/remember it, quickly rinse the plunger into the graduated cylinder using as little water as possible, and gently insert the hydrometer into the suspension.Place 50 grams of your dried, ground, and sieved soil sample in a 250 mL Erlenmeyer flask.Let the mixture sit over night (a minimum of 12 hours) to allow the solution to effectively disperse the soil separates (sand, silt, clay).Take reading after 2 hour (for particles less than 2 micrones).2.3.4.5.7.8.9.10.11.

1. Place 50 grams of your dried, ground, and sieved soil sample in a 250 mL Erlenmeyer
   flask.


2. Add 100 mL of 5% Calgon solution to the sample, cap flask, and swirl until solution and
   soil are well mixed (several minutes).


3. Let the mixture sit over night (a minimum of 12 hours) to allow the solution to effectively
   disperse the soil separates (sand, silt, clay).


4. Transfer soil-Calgon mixture from flask to a hydrometer jar. Use a water bottle to
   completely rinse all material (soil) from the flask into the jar.


5. Fill up with water to 1 liter


6. Slowly mix with a long glass rod and read temp to make sure its 20 C°


7. Insert the plunger into the graduated cylinder and gently mix the soil until a uniform
   suspension is obtained (at least 30 seconds).


8. Make sure that a clock with a second hand is readily visible and that a clean hydrometer
   is on hand.


9. As soon as you remove the plunger, check the exact time, record/remember it, quickly
   rinse the plunger into the graduated cylinder using as little water as possible, and gently
   insert the hydrometer into the suspension.


10. After 40 seconds has elapsed from the time the plunger was removed, read and record
    the 40-second hydrometer reading.


11. Remove the hydrometer, insert it again to take reading after 4 min (for particles less than
    20 micrones)


12. Take reading after 2 hour (for particles less than 2 micrones).