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ASTM D5377-93(2002)
Standard Classification for Rubber Compounding Materials - ;Ground Coalstandard by ASTM International, 12/10/2002
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.
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