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ASTM D7971

Standard Guide for Measuring Roundness of Glass Spheres Using a Flowing Stream Digital Image Analyzer

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Organization: ASTM
Publication Date: 1 April 2015
Status: inactive
Page Count: 4
scope:

This guide covers the determination of the roundness of glass spheres used in pavement marking systems using a flowing stream digital analyzer. Typical gradations for pavement marking systems are defined in ranges from Type 0 through 5 in AASHTO M247. 

This guide provides for the presentation of roundness data in a variety of formats to the requirement of the agency pavement marking material specification. For most specifications the standard format is to present the roundness data as Percent True Spheres relative to a series of standard ASTM sieve sizes. 

The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 

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.

Document History

June 1, 2020
Standard Guide for Measuring Roundness of Glass Spheres Using a Flowing Stream Digital Image Analyzer
This guide covers the determination of the roundness of glass spheres used in pavement marking systems using a flowing stream digital analyzer. Typical gradations for pavement marking systems are...
ASTM D7971
April 1, 2015
Standard Guide for Measuring Roundness of Glass Spheres Using a Flowing Stream Digital Image Analyzer
This guide covers the determination of the roundness of glass spheres used in pavement marking systems using a flowing stream digital analyzer. Typical gradations for pavement marking systems are...

References

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