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CAT NO: DIDACTICNLE-Export-120017
Dry Sieve Test Apparatus.
Technical Description
Soil
retention is a predominant function of geotextiles in drainage and
filtering applications. Pore size is the key parameter that controls the
ability of the geotextile to retain the soil. The Apparent Opening Size
(AOS) also called the Equivalent Opening Size (EOS) was developed by US
Army Corps of Engineers for evaluating this property. AOS is the size
of through holes in the geotextiles and provides an index to the size of
the largest opening through the geotextile. In conducting this test,
the geotextile fabric is placed (instead of a wire mesh) in a sieving
frame by using a special clamping arrangement. The test involves sieving
rounded particle sizes for which 5% or less by weight, pass through the
geotextile. The AOS is defined as 'Retained On' size of that fraction
expressed as a standard sieve number (size).
The apparatus consists of a 20 cm dia brass frame with clamp, a receiver and a lid.
Essential Accessories
Rounded Beads
Made of glass, size 0.85 mm (passing 1 mm and retained at 0.85 mm)
Rounded Beads
Made of glass, size 0.425 mm (passing 0.85 mm and retained at 0.425 mm)
Rounded Beads
Made of glass, size 0.25 mm (passing 0.425 mm and retained at 0.25 mm)
Rounded Beads
Made of glass, size 0.18 mm (passing 0.25 mm and retained at 0.18 mm)
Rounded Beads
Made of glass, size 0.15 mm (passing 0.18 mm and retained at 0.15 mm)
Rounded Beads
Made of glass, size 0.075 mm (passing 0.15 mm and retained at 0.075 mm)
Sieve Shaker
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