Note 8 — PART I SPECIFICATIONS FOR STREET ROADWAY PAVEMENTS
Reading edition
The frequent requirement that the fine material shall be screened out, is not necessary or advisable. Experiments and experience have shown conclusively that unless an unusual amount of fine material and “dust” be present, or unless this fine material be allowed to separate and aggregate in masses by itself, the resulting concrete is improved rather than deteriorated by its presence.
Where there is an unusual excess of “dust” in the crushed stone, the quantity of sand used in the concrete should be decreased accordingly.