From the authors’ own experience, the mechanical sieving
takes approximately 1–2 h to complete, while the flakiness
and elongation tests, both requiring cumbersome manual
gauging of particles one by one, together take about 2–3 h
to complete. Hence, it takes about 4 h to perform one set of
mechanical sieving and flakiness and elongation tests.
Despite the laborious work required to perform the tests,
however, there are a number of shortcomings with the flakiness
and elongation tests, as explained below