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Rubber crumbing extends waste tyre life span

Rubber crumbing extends waste tyre life span

Nov 16, 2014

Rubber crumb is derived by reducing scrap tyres into uniform granules. The inherent reinforcing materials such as steel and fibre are removed, along with any other type of inert contaminants such as dust, glass, or rock.

REDISA (Recycling and Economic Development Initiative of South Africa) Plan is approved by the Department of Environmental Affairs to clean the country of tyre waste through the creation of a new tyre recycling industry. As part of the Plan, REDISA works with transporters, depots and processors.

There is a growing demand for more and more waste tyres that can be used for end products made from the rubber, steel and textile derived from processing waste tyres. Crumb rubber is the result of processing automotive and truck scrap tyres in particular. During this process the steel and tyre cord (fluff) is removed, leaving tyre rubber with a granular consistency. This rubber crumb is often used in astroturf as cushioning, where it is sometimes referred to as astro-dirt, asphalt for tarring the roads, floor mats, carpet padding, vehicle mudguards and adhesives.

REDISA is not a recycler, but supports companies, both large and small, who recycle and process waste tyres into saleable products. “Our support ranges from business plan development, to assisting with Environmental Impact Assessments, and what we offer all recycling companies who are registered with REDISA is regular delivery of waste tyre feedstock,” says Stacey Davidson, director at REDISA.

Currently REDISA works with about 12 recyclers. As the REDISA Plan continues to roll out over the next five years, more recyclers and processors will be supported nationally. In addition REDISA is currently paying recyclers and processors an infrastructure development grant (based on the tonnage of tyres delivered). The R310 per tonne grant REDISA pays is used to improve infrastructure at the factories so that output can be increased – thereby further assisting in the sustainability and growth of each business,” commented Davidson.

REDISA is constantly looking to resolve issues that the public might have regarding stockpiled tyres, and encourages all members of the public who are aware of tyre stockpiles to contact REDISA at

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