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Standard Test Method for Measuring Gradation of Glass Spheres Using a Flowing Stream Digital Image AnalyzerTranslate name
STANDARD published on 1.11.2021
Designation standards: ASTM D7681-11(2021)
Publication date standards: 1.11.2021
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM
glass beads, gradation, particle size analyzer, sieve size,, ICS Number Code 93.080.20 (Road construction materials)
|Significance and Use|
5.1The gradation (size distribution) of glass beads has a significant influence on the retroreflective efficiency of a pavement marking system.
5.2This test method is for the characterization of the gradation (size distribution) of glass beads for the purpose of compliance testing against standard specification for glass beads in pavement marking applications.
5.3While there are potential industrial applications for this test method beyond the measurement of gradation (size distribution) of glass beads for pavement markings, those are beyond the scope of this standard.
1.1This test method covers the determination of the gradation (size distribution) 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 M247-08.
1.2This test method provides for the presentation of the size data in a variety of formats to the requirements of the agency pavement marking material specification. For most specifications the standard format is to present the size data as Percent Retained or Percent Passing relative to a series of standard US sieve sizes.
1.3The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
|2. Referenced Documents|
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