Active Standard: D5624 - 13
This process for obtaining uniform distribution of aggregates from an aggregate spreader is used by a number of agencies. However, variations in the mat width and material are common. The process of establishing, calibrating and verifying the transverse spread rate is consistent but the specifics in use and results vary substantially, depending on the material being placed, type of project, equipment manufacturer, age, condition, etc. A precision statement is not applicable to calculations which are uniquely specific to each combination of equipment, material, and mat variations. Therefore, this standard has been reworked as a practice rather than a test method. A generic equation for calculating the mass of material over an area is included for guidance only.
Keywordsaggregate spread; surface treatment; Aggregate; Aggregate spreader; Surface treatments; Transverse aggregate spread rate;
Ballot Item Approved as D5624-2013 and Pending Publication