Proportional Caliper Device


The Proportional Caliper Device is used to determine the percentages of flat, elongated, or flat and elongated particles in coarse aggregates. Specific procedures for conducting this test are described in ASTM D 4791.

proportional caliper device


The Proportional Caliper Device is made of plated steel, the 8 x 16 in (20.3 x 40.6 cm) base plate has four rubber feet for added stability. Three positions control the various ratios

C-641Proportional Caliper Device