ASTM D8490-23 pdf free download – Standard Test Method For Determining The Opening Size Of Circular Knit Geotextiles Using An Optical Method.
This test method ASTM D8490-23 is designed to measure the Image Opening Size (IOS) of a geotextile through the use of image analysis techniques. It presents the results in both the International System of Units (SI), which is the proper term for the metric system of units, and inch-pound units, the correct terminology for the standard units used in the United States. The values in inch-pound units are included solely for informational purposes.
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