Editing Tire (section)

=== Recycling ===
Tires can be recycled into, among other things, the hot melt [[Bitumen|asphalt]], typically as [[crumb rubber]] modifier—recycled asphalt pavement (CRM—RAP),<ref>Kandhal PS. (1992). [http://ntl.bts.gov/lib/6000/6400/6407/rep92-6.pdf Waste Materials in Hot Mix Asphalt - an overview] {{Webarchive|url= https://web.archive.org/web/20090513181152/http://ntl.bts.gov/lib/6000/6400/6407/rep92-6.pdf |date=13 May 2009 }}. National Center for Asphalt Technology.</ref><ref>T. E. Baker (2003). [http://www.wsdot.wa.gov/biz/mats/Draft%20Final%20Report%20Version%205.pdf Evaluation of the Use of Scrap Tires in Transportation Related Applications in the State of Washington] {{webarchive|url= https://web.archive.org/web/20110610051824/http://www.wsdot.wa.gov/biz/mats/Draft%20Final%20Report%20Version%205.pdf |date=2011-06-10 }}</ref> and as an aggregate in [[portland cement]] [[concrete]].<ref>M Nehdi, A Khan, (2001). [http://www.bvsde.paho.org/bvsacd/cd24/cementi.pdf Cementitious Composites Containing Recycled Tire Rubber: An Overview of Engineering Properties and Potential Applications] {{Webarchive|url= https://web.archive.org/web/20110724084425/http://www.bvsde.paho.org/bvsacd/cd24/cementi.pdf |date=24 July 2011 }}. ''Cement, Concrete, and Aggregates''.</ref> Shredded tires can create [[rubber mulch]] on playgrounds to diminish fall injuries.<ref>{{Cite book|url= https://archive.org/details/askgardendoctor10000unse|title=Ask the garden doctor : 1,200 cures for common garden problems |date=2010 |publisher=Wiley |others=Schrock, Denny.|isbn=9780470878422|location=Hoboken, N.J.|oclc=656770746}}</ref> There are some "green" buildings that are being made both private and public buildings that are made from old tires.<ref>{{Cite journal|last=Bignozzi|first=Maria Chiara |date=2011 |title=Sustainable Cements for Green Buildings Construction |journal=Procedia Engineering |volume=21 |pages=915–921 |doi=10.1016/j.proeng.2011.11.2094|doi-access=free}}</ref>

The [[tire pyrolysis]] method for recycling used tires is a technique that heats whole or shredded tires in a reactor vessel containing an [[Hypoxia (environmental)|oxygen-free]] atmosphere and a heat source. In the reactor, the [[rubber]] is softened after which the rubber polymers continuously break down into smaller molecules.