Roofing product including roofing-grade asphalt mixture and methods of making the roofing product and the roofing-grade asphalt mixture

Abstract

A method of forming a roofing-grade asphalt mixture can include mixing a bio-asphalt including a partially oxidized bio-source material, a bitumen source material different from the bio-asphalt, and particles to form the roofing-grade asphalt mixture. In an embodiment, the bitumen source material can have a softening point of at least approximately 102° C. and a penetration distance no greater than approximately 20 dmm. In another embodiment, the roofing-grade asphalt mixture can have a softening point of at least approximately 104° C., a penetration distance no greater than approximately 12 dmm, a viscosity of at least approximately 3000 cps at a temperature of 177° C., or any combination thereof. The roofing-grade asphalt mixture can be applied to a base material to form a roofing product.

What is claimed is: 
     
         1 . A roofing product comprising:
 a base material; and   a roofing-grade asphalt mixture comprising:
 a bio-asphalt including a partially oxidized bio-source material; 
 a bitumen source material different from the bio-asphalt; and 
 particles. 
   
     
     
         2 . The roofing product of  claim 1 , wherein the bitumen source material has a softening point of at least approximately 102° C. and a penetration distance no greater than approximately 20 dmm. 
     
     
         3 . The roofing product of  claim 2 , wherein the softening point of the bitumen source is at least approximately 105° C. or at least approximately 108° C. 
     
     
         4 . The roofing product of  claim 2 , wherein the penetration distance of the bitumen source material is no greater than approximately 17 dmm, no greater than approximately 14 dmm, or no greater than 11 dmm. 
     
     
         5 . The roofing product of  claim 1 , wherein the bitumen source material comprises a petroleum-based asphalt. 
     
     
         6 . The roofing product of  claim 1 , wherein the roofing-grade asphalt mixture has a softening point of at least approximately 104° C., a penetration distance no greater than approximately 12 dmm, a viscosity of at least approximately 3000 cps at a temperature of 177° C., or any combination thereof. 
     
     
         7 . The roofing product of  claim 1 , wherein the roofing-grade asphalt mixture has a softening point of at least approximately 121° C., a penetration distance no greater than approximately 15 dmm, a viscosity of at least approximately 5000 cps at a temperature of 177° C., or any combination thereof. 
     
     
         8 . The roofing product of  claim 1 , wherein the bio-asphalt comprises a partially oxidized vegetable oil, an animal oil, or any combination thereof. 
     
     
         9 . The roofing product of  claim 1 , wherein a softening point of the roofing-grade asphalt mixture is at least approximately 104° C., at least approximately 106° C., or at least approximately 108° C. 
     
     
         10 . The roofing product of  claim 1 , wherein a softening point of the roofing-grade asphalt is no greater than approximately 120° C., no greater than approximately 115° C., or no greater than approximately 112° C. 
     
     
         11 . The roofing product of  claim 1 , wherein the roofing-grade asphalt mixture has a total bitumen content, wherein the bio-asphalt is at least approximately 5 wt %, at least approximately 11 wt %, or at least approximately 15 wt % of the total bitumen content. 
     
     
         12 . The roofing product of  claim 1 , wherein the roofing-grade asphalt mixture has a total bitumen content, wherein the bio-asphalt is no greater than approximately 50 wt %, no greater than approximately 40 wt %, or no greater than approximately 35 wt % of the total bitumen content. 
     
     
         13 . The roofing product of  claim 1 , wherein at 177° C., the roofing-grade asphalt mixture has a viscosity of at least approximately 3500 cps, at least approximately 3700 cps, or at least approximately 3900 cps. 
     
     
         14 . The roofing product of  claim 1 , wherein at 177° C., the roofing-grade asphalt mixture has a viscosity no greater than approximately 5000 cps, no greater than approximately 4600 cps, or no greater than approximately 4500 cps. 
     
     
         15 . The roofing product of  claim 1 , wherein the particles includes limestone, talc, clay, coal fines, fly ash, gypsum, calcite, or any combination thereof. 
     
     
         16 . The roofing product of  claim 1 , wherein the bitumen source material comprises petroleum-based asphalt. 
     
     
         17 . The roofing product of  claim 1 , wherein the base material comprises a fiberglass mat, a cellulose-based material, or a polymer. 
     
     
         18 . The roofing product of  claim 1 , wherein the roofing-grade asphalt mixture further comprises a plasticizer. 
     
     
         19 . The roofing product of  claim 1 , wherein the roofing product is in a form of a roofing shingle. 
     
     
         20 . The roofing product of  claim 1 , wherein the roofing product is in a form of a roofing membrane.