Dry Sieve Test Apparatus

The test involves sieving rounded particle sizes for which 5% or less by weight pass through the geotextile. The Apparent Opening Size (AOS) is defined as 'Retained On' size of that fraction expressed as a standard sieve number (size). The test is widely used for relative comparison amongst the geotextiles. Thus AOS is a means of correlating geotextile pore structure to an equivalent screen mesh size. The apparatus consist of a 20 cm dia brass frame with clamp, a receiver and a lid
Sieve Shaker and glass beads to be ordered separately.

SGE-1004

Rounded Beads made of glass, size 0.85 mm (passing 1 mm and retained at 0.85 mm)

SGE-1005

Rounded Beads made of glass, size 0.425 mm (passing 0.85 mm and retained at 0.425 mm)

SGE-1006

Rounded Beads made of glass, size 0.25 mm (passing 0.425 mm and retained at 0.25 mm)

SGE-1007

Rounded Beads made of glass, size 0.18 mm (passing 0.25 mm and retained at 0.18 mm)

SGE-1008

Rounded Beads made of glass, size 0.15 mm (passing 0.18 mm and retained at 0.15 mm)

SGE-1009

Rounded Beads made of glass, size 0.075 mm (passing 0.15 mm and retained at 0.075 mm)