by: Leslie Jones
“What
do I do with these old tires?” One of the most popular recycling
questions ever asked. Our best advice to you is to go to your local
tire dealer to dispose of them properly. Tire dealers usually take
unwanted tires for around $1.50 - $2.00 per tire, then turn them over to
authorized recyclers.
“Rubber
is difficult to recycle due to the procedure known as “vulcanization,”
which it undergoes to attain its springy, flexible nature.
Vulcanization is
a curing process that involves adding sulfur to rubber, which creates
stronger bonds between the rubber polymers. Due to the vulcanization
method, tires are difficult to melt for reuse and are therefore
typically broken down by a mechanical process.
Initially,
whole tires are shredded into strips using rugged machines. The
shredded material is then placed in grinding machines that use rotors to
further shred the material and remove the steel fibers from the tire.
Some processors also use powerful magnets to further draw metal from the rubber.
Once
the bulk of the steel is removed, the strips are placed into
granulators. Depending on the consistency desired by the end user of the
shredded tires, the rubber can be milled into assorted sizes of
granules that are useful in a number of industries.”*
“Tires
are...often recycled for use on basketball courts and new shoe
products. However, material recovered from waste tires, known as
"crumb," is generally only a cheap "filler" material and is rarely used
in high volumes. Tires can also be recycled into other tires. Tires
have also been cut up and used in garden beds as bark mulch to hold in
the water and to prevent weeds from growing.”** Use as playground
“flooring” is growing in popularity, too.
“Why
can’t I just throw them in my trash or the landfill?” Another
excellent (and often asked) question. “Tires are not desired at
landfills, due to their large volumes and 75% void space, which quickly
consumes valuable space. Tires can trap methane gases, causing them to
become buoyant, or bubble to the surface. This ‘bubbling’ effect can
damage landfill liners that have been installed to help keep landfill
contaminants from polluting local surface and groundwater.”** Tires
also produce a residual chemical byproduct that has the potential to
contaminate groundwater.
Well, we can only use so many tire swings and tire sandboxes....and nobody
needs tire flower planters, so please consider taking your old tires to
your local tire dealer to recycle them into useful, innovative
products.
*http://earth911.com/recycling/automotive/tires/how-tires-get-recycled/
**http://en.wikipedia.org/wiki/Tire_recycling
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