ASTM WK72741
Revision of D6767 - 20 Standard Test Method for Pore Size Characteristics of Geotextiles by Capillary Flow Test
Active Standard: D6767 - 20a
Developed by Subcommittee: D35.03 | Committee D35 | Contact Staff Manager
WK72741
Keywords
Rationale
The task group is submitting two items for ballot. This item is to correct the specified accuracy tolerance for the digital flow meter that is both sufficiently accurate for the test and a more reasonable specification for commercially available digital flow meters. The industry standard for working flow meters is 2%, while calibration-level flow meters are 0.5%. And is to clarify that the User will not be able to obtain the sizes smaller than the O50 using Mineral Oil due to its viscosity and tendency to adhere to the fibers. The sizes smaller than O50 can be obtained using other wetting fluids of lower surface tension and lower viscosity. It may be necessary to use two wetting fluids in order to obtain the entire opening size distribution.
Back to TopWork Item Status
Date Initiated:
04-24-2020
Technical Contact:
Richard Lacey
Item:
006
Ballot:
D35 (20-05)
Status:
Ballot Item Approved as D6767-2020A
and Pending Publication
Item:
007
Ballot:
D35 (20-05)
Status:
Ballot Item Approved as D6767-2020A
and Pending Publication