ASTM D7466-08

ASTM D7466-08 - 1.7.2008

Significance and Use

The asperity height is an index property used to quantify one of the physical attributes related to the surface roughness of textured geomembranes.

This test method is applicable to all currently available textured geomembranes that are deployed as manufactured geomembrane sheets.

1. Scope

1.1 TThis test method covers a procedure to measure the asperity height of textured geomembranes.

1.2 This test method does not provide for measurement of the spacing between the asperities nor of the complete profile of the textured surface.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

D4439-25a	Standard Terminology for Geosynthetics (Includes all amendments and changes 9/30/2025).
D5994-10	Standard Test Method for Measuring Core Thickness of Textured Geomembrane
E177-26a	Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods (Includes all amendments and changes 5/14/2026).
E691-23	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E2554-18(2024)e1	Standard Practice for Estimating and Monitoring the Uncertainty of Test Results of a Test Method Using Control Chart Techniques (Includes all amendments and changes 10/23/2024).