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ASTM International launches efforts, seeks input for recovered carbon black standards

ASTM International members from its committee on recovered carbon black (rCB) (D36) are announcing and seeking input on new standards and related efforts. Several subcommittees are supporting these efforts to help the tire recycling industry.

For example, a subcommittee (D36.10) recently approved a list of 22 existing standards that are already being used in the carbon black industry. The group will now recognize these standards as acceptable for use in the rCB industry until rCB statistical data is available that may suggest otherwise.

In addition, the subcommittee on co-products (D36.20) is soliciting laboratories to participate in a round robin study on rubber-derived liquids. In this study, several existing test methods will be used to verify their reliability for those liquids.

Also, thirteen proposed terms from the subcommittee on nomenclature (D36.30) could be approved and published by the committee by late March.

Finally, a task group within the subcommittee on environmental safety and sustainability (D36.40) has been formed to explore areas of standardization for polycyclic aromatic hydrocarbons in tires. The task group will hold its initial meeting in conjunction with the conference of the European Tyre Recycling Association in Brussels, Belgium, on 14 March.

Background. Some one billion tires become scrap each year worldwide. Many countries now ban waste tires from landfills, although there are mountains of such tires. Recycling channels do exist, and end-of-life tires can be a fuel source for cement kilns and power plants. Shredded or ground tires can reinforce embankments and cushion running tracks. Whole tires can start a wall or a building.

These tires can also be reworked into recovered carbon black rCB which can be used as a substitute for traditional carbon black in many applications, including tire rubber.

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