Proportional

Proportional Caliper Apparatus (AG-037)

ASTM D4791

  • Used to determine the percentages of flat particles, elongated particles, or flat and elongated particles in coarse aggregates.
  • According to ASTM, both Method A and Method B can be performed using AG-037, while:
    • Method A , is a reflection of the original procedure as developed prior to Superpave and is intended for all non-Superpave applications.
    • Method B, is a comparison of the maximum particle dimension to the minimum particle dimension and is intended for use with Superpave specifications.