Heavy oil ash in roofing, damp-proofing, and water proofing applications

Patent metadata

Field	Value
Publication number	US-9249304-B2
Application number	US-201314069937-A
Country	US
Kind code	B2
Filing date	Nov 1, 2013
Priority date	Nov 1, 2013
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

This invention relates to asphalt compositions. More specifically, this invention relates to asphalt compositions including asphalt, heavy oil ash, and sulfur. The invention provides a heavy oil ash asphalt composition that includes a base asphalt, sulfur, and heavy oil ash resulting in improved properties, as well as a method of making the composition. The heavy oil asphalt compositions can be used for asphalt based roofing compositions, damp-proofing compositions, and water proofing materials.

First claim

That which is claimed is:

1. A heavy oil ash asphalt composition comprising:
a base asphalt having a stiffness;
a styrene-butadiene-styrene (SBS) block copolymer in a concentration range of 5%-10% by weight;
sulfur in a concentration range of 10%-30% by weight; and
heavy oil ash in a concentration range of 15%-25% by weight;
such that the heavy oil ash combines with the base asphalt and sulfur to create the heavy oil ash asphalt composition, where the heavy oil ash is present in the heavy oil ash asphalt composition in an amount effective to improve stiffness of the heavy oil ash asphalt composition as compared to the stiffness of the base asphalt.

2. The composition of claim 1 wherein the heavy oil ash has a carbon content of more than 90% by weight (wt. %).

3. The composition of claim 1 wherein the heavy oil ash is present in an amount effective to increase bonding strength over the base asphalt by at least 100%.

4. The composition of claim 1 wherein the heavy oil ash is present in an amount effective to increase bonding strength over the base asphalt by at least 500%.

5. A method of making the asphalt heavy oil ash composition of claim 1 , comprising the steps of:
heating the base asphalt to its melting point,
adding a styrene-butadiene-styrene (SBS) block copolymer to the base asphalt
adding the sulfur to the base asphalt,
adding the heavy oil ash to the base asphalt, and
mixing the asphalt heated to its melting point, the sulfur, and the heavy oil ash in a blender with a high shear blade such that intimate mixing of the asphalt, sulfur, and heavy oil ash is achieved.

6. A heavy oil ash asphalt composition comprising:
a base asphalt having a stiffness;
an ethyl vinyl acetate (EVA) polymer in a concentration range of 5%-10% by weight;
sulfur in a concentration range of 10%-30% by weight; and
heavy oil ash in a concentration range of 15%-25% by weight;
such that the heavy oil ash combines with the base asphalt and sulfur to create the heavy oil ash asphalt composition, where the heavy oil ash is present in the heavy oil ash asphalt composition in an amount effective to improve stiffness of the heavy oil ash asphalt composition as compared to the stiffness of the base asphalt.

7. The composition of claim 6 , wherein the heavy oil ash has a carbon content of more than 90% by weight (wt. %).

8. The composition of claim 6 , wherein the heavy oil ash is present in an amount effective to increase bonding strength over the base asphalt by at least 100%.

Assignees

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

Inventors

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

Classifications

• C04B18/087

  from liquid fuels, e.g. oil · CPC title

• C08L95/00 Primary

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

• C08L23/0853

  Ethylene vinyl acetate copolymers · CPC title

• D06N5/00

  Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch (compositions of bituminous materials C08L95/00, roof covering E04D5/00, roofing underlays E04D12/002) · CPC title

• C08K11/005

  Waste materials, e.g. treated or untreated sewage sludge · CPC title