Modified asphalt binder material using crumb rubber and methods of manufacturing a modified asphalt binder
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United States of America Patent
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Mar 4, 2014
Grant Date -
Feb 26, 2009
app pub date -
Oct 29, 2008
filing date -
May 2, 2005
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Abstract
In a first aspect, bituminous asphalt binder materials which are modified by the addition of crumb rubber or ground tire rubber are described. In a second aspect, the present invention is directed to methods of producing a modified asphalt binder containing crumb rubber or ground tire rubber. The modified asphalt binders comprise neat asphalt, crumb rubber, one or more synthetic polymers, and one or more acids. The crumb rubber may be obtained from recycled truck and/or automobile tires.
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