End Over End Shaker is a mechanical shaking apparatus capable of rotating the gas jar, end over end, at about 50 r/min.
Test Procedure
1. Clean and dry the gas jar and ground glass plate and weigh them together to the nearest 0.2 g.
2. Transfer the first soil specimen from its sealed container directly into the gas jar. Weigh the gas jar, ground glass plate and contents to the nearest 0.2 g.
3. Add about 500 mL of water at a temperature within ± 2 ºC of the average room temperature during the test to the soil. Insert the rubber stopper into the gas jar, and for medium- and coarse- grained soils set aside for at least 4 h.
4. At the end of this period, or immediately after the addition of water in the case of fine-grained soils, shake the gas jar by hand until the particles are in suspension.
5. Place the gas jar securely in the shaking apparatus and shake for a period of 20 min to 30 min.
6. Remove the stopper carefully and wash any soil particles adhering to the stopper or to the top of the gas jar into the jar. Disperse any froth with a fine spray of water. Add water to the gas jar to within 2 mm of the top and allow the soil to settle for a few minutes, then fill the gas jar to the brim with more water. Place the ground glass plate on the top of the jar taking care not to trap any air under the plate.
7. Dry the gas jar and plate carefully on the outside and weigh the whole to the nearest 0.2 g.
8. Empty the gas jar, wash it out thoroughly and fill it to the brim with water at a temperature within ± 2 ºC of the average room temperature. Place the ground glass plate in position taking care not to trap any air under the plate. Ensure that the water in the jar contains no air bubbles.
9. Dry the gas jar and plate carefully on the outside and weigh the whole to the nearest 0.2 g.
10. Repeat from 1 to 9 using the second specimen of the same soil so that two values of particle density can be obtained. If the results differ by more than 0.03 mg/m3 repeat the tests.
11. Calculate the particle density, (in mg/m3), calculate the average of the two results if they differ by no more than 0.03 mg/m3. Express the average value of particle density to the nearest 0.01 mg/m3.
Standard: BS 1377:2
Used to determine the particle density of soils containing up to 10% of particles retained on a 37.5 mm sieve.
It rotates two gas jars at approx. 50 rpm to satisfy BS Standard.
The shaker is equipped with an original friction device conforming the unit to CE Safety Directive.
End over end shaker is supplied complete with gas jars.
Power supply: 230V 50Hz 1ph 150W
Dimensions: 550x430x500 mm
Weight: 20 kg approx.