Process for producing tire rubber modified asphalt cement systems and products thereof
AssigneeNeste/Wright Asphalt Products, Co.
InventorTheodore P. Flanigan
Life of this patent
Estimating the term…
Abstract
A process for preparing an incorporated asphalt composition includes mixing ground tire rubber with distillation tower bottoms to form a wetted mixture of the ground tire rubber with the distillation tower bottoms, bombarding the wetted mixture of ground tire rubber and distillation tower bottoms with air at a temperature of about 350.degree.-485.degree. F. at about 6-15 psi pressure until the mixture is completely incorporated, and recovering the incorporated asphalt composition. The homogenized asphalt product is a two-member composition of distillation tower bottoms having ground tire rubber incorporated therein.
Claims15
A process for preparing an incorporated asphalt composition consisting essentially of the steps of:
- A. mixing ground tire rubber with distillation tower bottoms to form a wetted mixture of the ground tire rubber with the distillation tower bottoms;
- B. bombarding the wetted mixture of ground tire rubber and distillation tower bottoms with air at a temperature of about 350.degree.-485.degree. F. at about 6-15 psi pressure;
- C. abrasively absorbing the ground tire rubber into the distillation tower bottoms until the mixture is homogenized and a stable incorporated asphalt composition is formed;
- D. recovering the incorporated asphalt composition.
A process according to claim i wherein about 12-25% ground tire rubber is mixed into about 75-88% distillation tower bottoms.
A process for preparing an incorporated asphalt composition consisting essentially of the steps of:
- B. injecting air at a temperature of about 350.degree.-485.degree. at a flow rate of about 1600-2800 cfm and about 6-15 psi pressure for about 2 to 6 hours through a stationary spider-shaped device;
- C. bombarding the wetted mixture of ground tire rubber and distillation tower bottoms with the injected air;
- D. abrasively absorbing the ground tire rubber into the distillation tower bottoms until the mixture is incorporated;
- E. recovering the incorporated asphalt composition.
An incorporated asphalt composition consisting essentially of about 1-27% ground tire rubber incorporated into about 73-99% distillation tower bottoms.
Dependencies are inferred from the claim text.