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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.
1.1 This 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D4439 Terminology for Geosynthetics
D5994 Test Method for Measuring Core Thickness of Textured Geomembranes
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E2554 Practice for Estimating and Monitoring the Uncertainty of Test Results of a Test Method in a Single Laboratory Using a Control Sample Program
ICS Number Code 59.080.70 (Geotextiles)
UNSPSC Code 30121701(Geomesh)