ASTM D7971 Standard guidance for Measuring the roundness of glass Spheres using a Flow Digital Image Analyzer includes determining the roundness of glass spheres used in pavement marking systems using a flow digital Image analyzer.
의미와 용도

4.1 The roundness of the glass beads has a significant effect on the reverse reflection efficiency of the pavement marking system.

4.2 This guide is used to characterize the roundness of glass beads for conformance testing to standard specifications for glass beads in pavement marking applications.

4.3 While the potential industrial applications of this guidance extend beyond measuring the roundness of glass beads for pavement markings, these applications are beyond the scope of this standard.

플로우 디지털 이미지 분석기를 사용하여 유리구의 진원도를 측정하기 위한 ASTM D7971-2015 표준 가이드

단계 1: 범위

1.1 This guide covers the use of a flow flow digital analyzer to determine the roundness of glass spheres used in pavement marking systems. Typical grades for pavement marking systems are defined in the type 0 에게 5 range in AASHTO M247.

1.2 This Guide specifies the representation of roundness data in various formats to meet the requirements of the Agency pavement marking Material specification. For most specifications, the standard format is to display the roundness data as a percentage true sphere relative to a range of standard ASTM sizing sizes.

1.3 SI 단위로 표현된 값은 표준값으로 간주됩니다.. 이 표준에는 다른 측정 단위가 포함되어 있지 않습니다..

1.4 이 표준은 모든 안전 문제를 해결하기 위한 것이 아닙니다., 만약에 어떠한, 그 사용과 관련된. 적절한 안전 및 보건 관행을 확립하고 사용 전에 규제 제한의 적용 가능성을 결정하는 것은 이 표준 사용자의 책임입니다..