ASTM D8632-25

1.1 This classification covers the definition of types of recovered carbon black (rCB) for the use in rubber compounds.

1.2 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

3.1 In accordance with Terminology D8178, recovered carbon black is defined as a semi-reinforcing filler derived from post-consumer rubber goods (feedstock) via a variety of thermal decomposition processes. This type of filler, predominantly consisting of carbon, also contains inorganic compounding ingredients originating from the feedstock, but is free of wire and fabric. This classification facilitates the selection of a type of rCB for a specific application in rubber compounds.