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.
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-641||Proportional Caliper Device|