FR-AG 022/b
Explanation: The thickness determination apparatus is used to determine whether the amount of flat grain in the aggregate stack according to BS standard is acceptable, that is, the grain size (smallest size) is smaller than 0.6 times the average of the sieve eye openings belonging to the grain Class range to which it belongs.The aggregates to be tested are divided into 7 different grain classes from 63mm to 6.3 mm, and each grain class is analyzed separately.
Eye openings are 4.9×30 mm, 7.2×40 mm, 10.2×50 mm, 14.4×60 mm, 19.7×80 mm, 26.3×90 mm, and 33.9×100 mm.
