19-03-2015 дата публикации
Номер: US20150080505A1
Принадлежит:
Disclosed herein are compositions and methods relating to rubber compositions, comprising crumb rubber and a maltene-like oil, which provides simultaneous rut, crack, moisture, and temperature resistance in both dense grade and gap grade paving mixtures. Also disclosed are methods of producing the rubber compositions, and methods of using the same. 1. A rubber composition , comprising , crumb rubber and a maltene-like oil , wherein the maltene-like oil is absorbed in the crumb rubber and the crumb rubber is thereby swelled to a size found when crumb rubber is cooked in asphalt at 350° F. for one hour with agitation , wherein the composition is substantially free of a bituminous mixture , and wherein the composition provides simultaneous rut , crack , moisture , and temperature resistance in both dense grade and gap grade paving mixtures.2. The rubber composition of claim 1 , wherein the composition is coated with a high surface-to-volume ratio powder.3. The rubber composition of claim 2 , wherein the high surface-to-volume ratio powder is less than 10 microns.4. The rubber composition of claim 2 , wherein the powder is sand claim 2 , talcum powder claim 2 , bentonite clay claim 2 , 200 mesh rubber claim 2 , hydrated lime or Advera WMA.5. The rubber composition of claim 1 , wherein the crumb rubber comprises ambient ground crumb rubber.6. The rubber composition of claim 1 , wherein the crumb rubber is cryogenically ground rubber.7. The rubber composition of claim 1 , wherein the crumb rubber has a sieve designation of from about 4 mesh to about 240 mesh.8. The rubber composition of claim 1 , wherein the crumb rubber has a sieve designation of from about 10 mesh to about 80 mesh.9. The rubber composition of claim 1 , wherein the maltene-like oil comprises small molecular weight resins.10. The rubber composition of claim 1 , wherein the maltene-like oil comprises aromatic hydrocarbons with or without O claim 1 , N claim 1 , and S.11. The rubber composition of claim 1 , ...
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