ASTM International - ASTM D5377-93(1998)
Standard Classification for Rubber Compounding Materials-Ground Coal
|Publication Date:||10 May 1998|
1.1 This classification covers the compounding material known as ground coal. It is generally used in rubber compounds as a filler.
1.2 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.