Asphalt materials containing bio-oil and methods for production thereof

Patent metadata

Field	Value
Publication number	US-9523003-B2
Application number	US-201414216000-A
Country	US
Kind code	B2
Filing date	Mar 17, 2014
Priority date	May 1, 2009
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

An asphalt binder includes asphalt and an asphalt binder modifier, which includes bio-oil. The asphalt binder can include a carboxyl additive. The asphalt can optionally include polymer-modified asphalt. An asphalt material includes mineral aggregate, an asphalt material binder including asphalt, and an asphalt binder modifier including bio-oil. A method for making the asphalt binder is disclosed. The asphalt material includes asphalt pavement and roofing shingles. The asphalt binder can be emulsified with water and a surfactant for use as a weatherproofing sealant or as an adhesive.

First claim

What is claimed:

1. An asphalt binder comprising:
asphalt and
an asphalt binder modifier comprising a liquid bio-oil having a water content of less than 4% by weight and a carboxyl additive, the carboxyl additive having a concentration of from about 0.18% to about 10% by weight of the asphalt binder.

2. The asphalt binder of claim 1 , wherein the liquid bio-oil is produced from a fast pyrolysis process of biomass.

3. The asphalt binder of claim 1 , wherein the asphalt binder modifier further comprises a polymer.

4. The asphalt binder of claim 1 , wherein the asphalt binder modifier comprises 40% by weight of said asphalt binder.

5. The asphalt binder of claim 1 , wherein the asphalt binder further comprises water and a surfactant and forms an emulsion.

6. The asphalt binder of claim 1 , wherein the carboxyl additive is a tall oil fatty acid.

7. An asphalt material comprising:
a mineral aggregate,
an asphalt material binder comprising asphalt, and
an asphalt binder modifier comprising a liquid bio-oil having a water content of less than 4% by weight and a carboxyl additive, the carboxyl additive having a concentration of from about 0.18% to about 10% by weight of the asphalt binder.

8. The asphalt material of claim 7 , wherein the asphalt binder modifier further comprises a polymer.

9. The asphalt material of claim 7 , wherein the carboxyl additive is a tall oil fatty acid.

10. A method for the production of an asphalt binder comprising:
a) combining asphalt with a liquid bio-oil having a water content of less than 4% by weight and a carboxyl additive, the carboxyl additive having a concentration of from about 0.18% to about 10% by weight of the combination;
b) heating the combination; and
c) mixing the combination until a homogeneous mixture is obtained.

11. The method of claim 10 , wherein the asphalt binder comprises asphalt and up to about 40% by weight liquid bio-oil.

12. The method of claim 10 , wherein the carboxyl additive a tall oil fatty acid.

Assignees

• Univ Iowa State Res Found Inc

Inventors

• Williams Ronald Christopher
• Brown Robert C
• Tang Sheng

Classifications

• C04B14/06

  Quartz; Sand · CPC title

• C04B40/0082

  making use of a rise in temperature, e.g. caused by an exothermic reaction · CPC title

• C04B14/28

  of calcium · CPC title

• C04B24/34

  Natural resins, e.g. rosin {(C04B24/243 takes precedence)} · CPC title

• C04B26/26

  Bituminous materials, e.g. tar, pitch {(C08L95/00 takes precedence)} · CPC title