Dry Sieve Test Apparatus Manufacturer,Supplier and Exporter in USA
Product Code : JA-GT-9861
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Dry Sieve Test Apparatus
Description:-
AOS is the size of the holes in the geotextiles and it provides an index to the size of the largest opening through the geotextile.
The Apparent Opening Size (AOS) also called the Equivalent Opening Size (EOS) was developed of Engineers for evaluating this property.
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.
Pore size is the key parameter that controls the ability of the geotextile to retain the soil.
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 consists of a 20 cm dia brass frame with clamp, a receiver and a lid.
The AOS is defined as 'Retained On' size of that fraction expressed as a standard sieve number (size).
Soil retention is a predominant function of geotextiles in drainage and filtering applications.
