ISRI Scrap Specifications Circular

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Guidelines for Tire Scrap

SCRAP SPECIFICATIONS CIRCULAR 2022

Guidelines for Tire Scrap: TS-2022 Rubber From Scrap Tires General Guidelines Items not covered in the specifications, and any variations in the specification are subject to special arrangement between Buyer and Seller. Percentages listed below are by weight. Definitions Fines consist of materials that pass a 4.75 mm sieve. These materials may include rubber, fiber, inorganic and organic matter, dirt, and other non-tire materials. Sizes will be determined by sieving. Suitable sieve sizes will be selected. Nest the sieves in order of decreasing size of opening from top to bottom and place the sample on the top sieve. Agitate the sieves by hand or by mechanical appara- tus for a sufficient period so that additional sieving does not result in substantial additional material passing through the sieves. TDM refers to tire-derived material. Rubber Primarily Used for Civil Engineering TDM 2–A

TDM 3–C ► At least 90%must be smaller than 4”; ► at least 75%must be larger than 1 1 / 2 ”; ► at least 90%must be larger than 1 / 2 ”; and ► maximum of 5% fines. TDM 5–A ► All material must be smaller than 8”; ► at least 90%must be smaller than 6”; ► at least 50%must be larger than 3”; ► at least 90%must be larger than 1/2”; ► maximum of 1” protrusion of steel; and ► maximum of 1% fines. TDM 5–B

► All material must be smaller than 8”; ► at least 90%must be smaller than 6”; ► at least 50%must be larger than 3”; ► at least 90%must be larger than 1 / 2 ”; ► at least 90%must not exceed 2” protrusion of steel; and maximum of 5% fines. TDM 5–C

► All material must be smaller than 8”; ► at least 90%must be smaller than 6”; ► at least 50%must be larger than 3”; ► at least 90%must be larger than 1 / 2 ”; and ► maximum of 5% fines. TDM 8–A ► At least 90% must be smaller than 12”; ► at least 75%must be smaller than 8”; ► at least 50%must be larger than 3”; ► at least 75%must be larger than 1 1 / 2 ”; ► maximum of 2” protrusion of steel; and ► maximum of 1% fines. TDM 8–B

► All material must be smaller than 4”; ► at least 90%must be smaller than 2 1 / 2 ”; ► at least 50%must be larger than 1 1 / 2 ”; ► at least 90%must be larger than 1 / 2 ”; ► maximum of 1 / 2 ” protrusion of steel; and ► maximum of 1% fines. TDM 2–B

► At least 90% must be smaller than 12”; ► at least 75%must be smaller than 8”; ► at least 50%must be larger than 3”; ► at least 75%must be larger than 1 1 / 2 ”; ► at least 90%must not exceed 2” protrusion of steel; and maximum of 5% fines. TDM 8–C

► All material must be smaller than 4”; ► at least 90%must be smaller than 2 1 / 2 ”; ► at least 50%must be larger than 1 1 / 2 ”; ► at least 90%must be larger than 1 / 2 ”; ► at least 90% must not exceed 1” protrusion of steel; and ► maximum of 5% fines. TDM 2–C

► At least 90% must be smaller than 12”; ► at least 75%must be smaller than 8”; ► at least 50%must be larger than 3”; ► at least 75%must be larger than 1 1 / 2 ”; and ► maximum of 5% fines. TDM 12–A ► At least 90% must be smaller than 18”; ► at least 50%must be larger than 6”; ► at least 75%must be larger than 1 1 / 2 ”; ► maximum of 2” protrusion of steel; and ► maximum of 1% fines. TDM 12–B

► All material must be smaller than 4”; ► at least 90%must be smaller than 2 1 / 2 ”; ► at least 50%must be larger than 1 1 / 2 ”; ► at least 90%must be larger than 1 / 2 ”; and ► maximum of 5% fines. TDM 3–A ► At least 90%must be smaller than 4”; ► at least 75%must be larger than 1 1 / 2 ”; ► at least 90%must be larger than 1 / 2 ”; ► maximum of ½” protrusion of steel; and ► maximum of 1% fines. TDM 3–B

► At least 90% must be smaller than 18”; ► at least 50%must be larger than 6”; ► at least 75%must be larger than 1 1 / 2 ”; ► at least 90%must not exceed 2” protrusion of steel; and maximum of 5% fines. TDM 12–C ► At least 90% must be smaller than 18”; ► at least 50%must be larger than 6”; ► at least 75%must be larger than 1 1 / 2 ”; and ► maximum of 5% fines.

► At least 90%must be smaller than 4”; ► at least 75%must be larger than 1 1 / 2 ”; ► at least 90%must be larger than 1 / 2 ”; ► at least 90% must not exceed 1” protrusion of steel; and maximum of 5% fines.

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