Homogeneous crumb rubber modified asphalt
OwnerMohammed Memoninventor
Life of this patent
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Abstract
An improved asphalt composition for pavement and a method for producing the same is characterized by mixing peroxide with crumb rubber to modify the crumb rubber so that mixes more evenly with the asphalt when added thereto. A compatibilizer/polymer is also added to the asphalt. The resulting composition is homogeneous and demonstrates improved settling and rheological properties at high and low temperatures.
Claims13
A method for producing crumb rubber modified asphalt, comprising the steps of
- (a) heating a quantity of crumb rubber to a first temperature;
- (b) mixing peroxide with the crumb rubber;
- (c) adding the crumb rubber to asphalt binder;
- (d) adding a compatibilizer to the asphalt;
- and
- (e) continuously stirring the asphalt while maintaining the asphalt at a second temperature greater than said first temperature, whereby the crumb rubber is evenly disbursed throughout the asphalt to improve the settling characteristics thereof.
An improved asphalt composition formed by a process comprising the steps of
- (a) heating a quantity of crumb rubber to a first temperature;
- (b) mixing peroxide with the crumb rubber;
- (c) adding the crumb rubber to asphalt including a binder;
- (d) adding a compatibilizer to the asphalt;
- and
- (e) continuously stirring the asphalt while maintaining the asphalt at a second temperature greater than said first temperature, whereby the crumb rubber is evenly disbursed throughout the asphalt to improve the settling characteristics thereof.
An asphalt composition, comprising a mixture of asphalt, crumb rubber modified by hydrogen peroxide, and a compatibilizer.
Dependencies are inferred from the claim text.