Work Item
ASTM WK80720

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

1. Scope

Determination of the geometrical properties of the pores of thin geotextiles using an image analysis technique.


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: Will Reballot Item

Item: 004

Ballot: D35 (22-04)

Status: In Balloting