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Definition of Crumb rubber

Crumb rubber Definition from Society & Culture Dictionaries & Glossaries
EPA Terms of Environment
Ground rubber fragments the size of sand or silt used in rubber or plastic products, or processed further into reclaimed rubber or asphalt products.
Provided as a public service by the U.S. Environmental Protection Agency
Environmental Engineering (English ver.)
Ground rubber fragments the size of sand or silt used in rubber or plastic products, or processed further into reclaimed rubber or asphalt products.
Crumb rubber Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
Crumb rubber is recycled rubber from automotive and truck scrap tires. During the recycling process steel and fluff is removed leaving tire rubber with a granular consistency. Continued processing with a granulator and/or cracker mill, possibly with the aid of cryogenics or mechanical means, reduces the size of the particles further. The particles are sized and classified based on various criteria including color (black only or black and white). The granulate is sized by passing through a screen, the size based on a dimension (1/4") or mesh (holes per inch : 10, 20, etc.). Crumb rubber is often used in astroturf as cushioning, where it is sometimes referred to as astro-dirt.

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