Dry Sieve Test Apparatus

Model HV-EXP2949
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 Motorised