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Tyres-processing

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Tyres consist mainly of steel, rubber compound and textiles (often in the form of cotton). The typical composition of tyre rubber is as follows:

TyreComposition

Number of parts containing the material

% Weight

Rubber hydrocarbon

100

51

Carbon black

50

26

Oil

25

13

Sulphur

2

1

Zinc Oxide

4

2

Other chemicals*

15

7

 

Source: Opportunities and Barriers to Scrap Tyre Recycling, AEA Technology Report, 1994

* Includes inorganic fillers, organic vulcanisation activators and accelerators, and processing aids.

 

For the recycling of rubber it is necessary first to be cut. Depending on the size of the product the cutting is distinguished:

• cut tire (size pieces 76-13mm)
• The tire detritus (detritus size 19 - 0,15 mm)
• the rubber powder (grain size 4,75 - 0,075 mm)

The detritus and rubber powder can be used in a range of applications, such as the modified bitumen. The pieces rubber is used in engineering construction projects in national roads, rail lines as antivibration or filling material, and many other applications. The alternative management of tires,  helps in the  elongation of  life of landfill waste areas.