Glossary of Terms and Acronyms Page 7 | 27 Circular Economy An economic system where products and services are traded in closed loops or cycles. It tackles global challenges like climate change, biodiversity loss, waste and pollution. Circular Economy aims to redefine growth, focusing on positive society-wide benefits. It is based on three principles: Design out waste and pollution; keep products and materials in use; regenerate natural systems. Civil Engineering A professional engineering discipline that deals with the design, construction and maintenance of the physical and naturally build environment. Civil engineering applications include reusing scrap/waste tires, either whole or shredded, in place of naturally occurring materials in construction. Uses include as an aggregate replacement in leachate collection systems, as lightweight fill material, stormwater drainage, bridge abutment backfills, slope stabilization and vibration dampening. Additional Information regarding civil engineering information and properties of Tire Derived Aggregate (TDA). Classification by Source of Rubber Table 1 captures the classification and category descriptions of tire and non-tire rubber. See ASTM D5603 – 19. Classification by Particle Size Table 2 A (Coarse Sizes, 1 mm 18 mesh and larger) and Table 2 B (Fine Sizes, smaller than 1 mm 18 mesh) is designed to assist in the classification of particulate rubber. See ASTM D5603 – 19. Classifier Any apparatus for separating mixtures of material into their constituents according to size and density. Collection The act of picking up and moving take-off tires from the location of their generation to sorting stations or tire recycling facilities. Collection Fee Fee charged to collect and/or haul and/or transport take-off tires or shredded tire material. Compound Intimate admixture of a polymer(s) with all the materials necessary for the finished article. (ASTM D1566 – 21) Compounding Material Substance used as part of a rubber mix. (ASTM D1566 – 21)
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