ASTM D 5377 - 93 (Reapproved 2017) Standard Classification for Rubber Compounding Materials - Ground Coal

Current edition approved Feb. 1, 2017. Published March 2017. Originally approved in 1993. Last previous edition approved in 2012 as D5377 – 93 (2012). — 2 p.
This classification covers the compounding material known as ground coal. It is generally used in rubber compounds as a filler.
There are three grades of ground coal based on particle size, ash, and moisture. The selected values for these properties are suitable for use in a rubber compound.