Standard: BS 1377:2
This equipment is used to determine the quantitative size distribution of very fine particle in soils, like clay and silt.
The complete set comprises:
S144 Andreasen pipette, 25 ml capacity, for an accurate extraction of the quantities of soil in suspension for analysis.
S144-01 Pipette stand, to accurately raise and lower the pipette with no transmission of vibration to not disturb the sample suspension.
Weight: 10 kg
S144-02 Sedimentation cylinder, 500 ml capacity
S144-03 Rubber bung for cylinder
S144-04 Evaporating dish, glass, Ø 90 by 50 mm height.
V172-03 Soil hydrometer, long stem, 0.995 to 1030 g/ml.
S155-04 Glass tank, dimensions: 600x300x380 mm.
S155-09 Heater, professional type, complete with thermostat, cooling coil, circulation unit. Alternative: S155-09S simple type.
S155-10 Thermometer, range 0 - 50 °C, subd. 0.5 °C.
Total weight: 40 kg approx.
Note: each item can be ordered separately.
Accessories:
S144-10 Andreasen Pipette, capacity: 10 ml
C306-03 Control panel, complete with on/off switch and electric protections, to get S155-09 heater to CE Safety Directive.
A117 End Over End Shaker
How To:
In this method, 25 to 100 gr sample is taken from the soil passing through the sieve no. 200.
500 ml suspension with the soil sample in total is prepared in a glass measuring cylinder.
A dispersant is added to the suspension to prevent aggregation of the particles.
The suspension, which is thoroughly mixed in a mixer, is transferred into a glass measuring cylinder and placed in a water bath or a heated glass tank that maintains a constant temperature throughout the experiment.
After starting the experiment, 10 ml suspension samples are taken from a depth of 100 mm from the suspension surface with an Andreasen pipette at the end of certain periods (t:15s, 30s, 1min, 2min....24h etc.).
These samples are dried in an oven and the dry masses are determined by weighing on a sensitive balance.