Work Item
ASTM WK80720

New Test Method for Determining the Opening Size of Circular Knit Geotextiles Using an Optical Method

1. Scope

2.1 The scope of the Committee shall be the formulation of test methods, specifications, guides, practices, terminology, and the dissemination of knowledge dealing with geosynthetics. This would include but not be limited to geotextiles, geogrids, drainage nets, drainage composites, geosynthetic clay liners, geosynthetic erosion control products and sediment retention devices, geosynthetic strips, geofoam and geomembranes.
2.2. The formulation of test methods, specifications, guides, practices and terminology for Geosynthetic related products shall be considered by the Committee by establishment of special subcommittees approved by the Executive Subcommittee.
2.3 The work of this Committee will be coordinated with other ASTM committees or organizations having mutual interest.


opening size; knitted geotextile; circular knit; tubular knit; optical method; filtration; drainage; AOS; D4751; FOS; D6767; D6707; O95; O90; Mean pore size


Pore openings of thin geotextiles, and in particular knitted geotextiles, can be observed with a microscope. The proposed standard will propose a methodology to capture images of the pores, and to process them to determine the properties of the pores.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: D35.03

Committee: D35

Staff Manager: Travis Murdock

Work Item Status

Date Initiated: 01-27-2022

Technical Contact: Eric Blond

Item: 001

Ballot: D35.03 (22-01)

Status: In Balloting