Sulfur extended asphalt modified with crumb rubber for paving and roofing

Patent metadata

Field	Value
Publication number	US-10407557-B2
Application number	US-201715664850-A
Country	US
Kind code	B2
Filing date	Jul 31, 2017
Priority date	Aug 14, 2013
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

The present invention relates to asphalt compositions. The present invention provides for a sulfur rubber asphalt binder composition that includes a base asphalt having a softening point, elemental sulfur, and a recycled crumb rubber material. The crumb rubber material is combined with the base asphalt and the elemental sulfur to create the sulfur rubber asphalt binder composition. The crumb rubber material is present in the sulfur rubber asphalt binder in an amount effective to increase the softening point as compared to the softening point of the base asphalt.

First claim

What is claimed is:

1. A sulfur rubber asphalt binder composition comprising:
a base asphalt,
elemental sulfur, and
a crumb rubber material, the crumb rubber is a recycled material,
where the elemental sulfur is in a range of from about 30 to about 50 weight percent and the crumb rubber material is in a range of from about 1 to about 6 weight percent, each by weight of the sulfur rubber asphalt binder composition.

2. The composition of claim 1 , where the sulfur rubber asphalt binder composition and the base asphalt each have a softening point temperature, and the softening point temperature for the sulfur rubber asphalt binder composition is greater than that of the base asphalt.

3. The composition of claim 1 , where the sulfur rubber asphalt binder composition and the base asphalt each have a penetration grade value, and the penetration grade value for the sulfur rubber asphalt binder composition is less than that of the base asphalt.

4. The composition of claim 1 , where the sulfur rubber asphalt binder composition and the base asphalt each have a Performance Grade temperature range, and the Performance Grade temperature range for the sulfur rubber asphalt binder composition is broader than that of the base asphalt.

5. The composition of claim 1 , where the Performance Grade temperature range of the sulfur rubber asphalt binder composition is selected from the group consisting of group consisting of 70-10, 76-10, 82-10 and 88-10.

6. The composition of claim 1 , where the sulfur rubber asphalt binder composition and the base asphalt each have a set of complex modulus (G*) values associated with a range of temperature values, and where each G* value for the sulfur rubber asphalt binder composition is greater at each temperature value within the range of temperature than that of the base asphalt.

7. The composition of claim 6 , where the range of temperature is from 64° C. to 76° C.

8. The composition of claim 1 , where the composition is used in paving.

9. The composition of claim 1 , where the composition is used in roofing.

10. An asphalt composition comprising the sulfur rubber asphalt binder composition of claim 1 , an aggregate material and a filler.

11. The asphalt composition of claim 10 , where the aggregate material is a gravel.

12. The asphalt composition of claim 10 , where the filler is a mineral filler.

13. The asphalt composition of claim 10 , where the composition is used in paving.

14. The asphalt composition of claim 10 , where the composition is used in roofing.

Assignees

• Saudi Arabian Oil Co
• Univ King Fahd Pet & Minerals

Inventors

• Al-Mehthel Mohammed
• Parvez Mohammad Anwar
• Al-Abdul Wahhab Hamad I
• Hussein Ibnelwaleed A
• Al-Idi Saleh H

Classifications

• C08L2555/22

  Asphalt produced above 140°C, e.g. hot melt asphalt · CPC title

• C09D147/00

  Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds; Coating compositions based on derivatives of such polymers (C09D145/00 takes precedence; based on conjugated diene rubbers C09D109/00 - C09D121/00) · CPC title

• C08L2555/34

  Recycled or waste materials, e.g. reclaimed bitumen, asphalt, roads or pathways, recycled roof coverings or shingles, recycled aggregate, recycled tires, crumb rubber, glass or cullet, fly or fuel ash, or slag · CPC title

• C08L21/00

  Compositions of unspecified rubbers · CPC title

• C08L95/00

  Compositions of bituminous materials, e.g. asphalt, tar, pitch · CPC title