Test Standard Category

A072-10 Proportional caliper

( Aggregates-Rocks )

  • ASTM D4791

Used either for rapid determination of percentages of flat and elongated particles in coarse aggregate fractions of 3/8" (9.5 mm) or larger. Consisting of 8"x16" (203.2x406.4 mm) base plate with rubber feets, two fixed posts and a 12" (305 mm) pivoting arm, allowing ratios of 1:2, 1:3, 1:4, 1:5 to be obtained.

Weight: 3 kg 

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Physical and geometric properties

  • BS 812:105.1
  • ASTM D4791