Engineered cementitious composites

Patent metadata

Field	Value
Publication number	US-11267756-B2
Application number	US-202016838169-A
Country	US
Kind code	B2
Filing date	Apr 2, 2020
Priority date	Apr 2, 2019
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

Engineered Cementitious Composites (ECC) and cement products including Engineered Cementitious Composites are provided. The ECC can include cement, sugar cane bagasse ash, and fiber. The sugar cane bagasse ash can be processed to provide a partial cement or sand replacement in ECCs and cement products.

First claim

What is claimed is:

1. An Engineered Cementitious Composite (ECC) comprising: cement, fibers, and fine aggregate;
where the fine aggregate comprises sugar cane bagasse ash SCBA;
where the fibers comprise about 1% to 3% volume fraction of the ECC; and
where the fibers comprise non-oil-coated polymeric fibers selected from non-oil-coated Polyvinyl Alcohol (PVA), non-oil-coated Polypropylene (PP), non-oil-coated Polyethylene (PE), or a combination thereof.

2. The Engineered Cementitious Composite of claim 1 , wherein the cement comprises about 5% to about 90% of the ECC by volume.

3. The Engineered Cementitious Composite of claim 1 , wherein the SCBA comprises about 5% to about 90% percent of the fine aggregate by volume.

4. The Engineered Cementitious Composite of claim 1 , wherein the fine aggregate further comprises fine silica sand.

5. The Engineered Cementitious Composite of claim 1 , further comprising water.

6. The Engineered Cementitious Composite of claim 5 , wherein the ECC has a tensile strain capacity of about 2% to 10%.

7. The Engineered Cementitious Composite of claim 5 , further comprising high range water reducer.

8. The Engineered Cementitious Composite of claim 1 , wherein the ratio by weight of the sugar cane bagasse ash to cement is about 1:20 to 9:1.

9. The Engineered Cementitious Composite of claim 1 , wherein a portion of the cement is substituted by a supplementary cementitious material;
wherein the supplementary cementitious material comprises fly ash; and
wherein the fly ash to cement ratio is about 1:20 to 9:1 by weight.

10. A concrete product, comprising an Engineered Cementitious Composite (ECC), wherein the ECC comprises cement, fine aggregate, and polymeric fiber;
where the cement comprises about 5% to 90% by weight of the ECC;
where the fine aggregate comprises about 5% to 90% by weight of the ECC;
where the polymeric fiber comprises about 1% to 3% by volume of the ECC;
where the polymeric fibers are selected from Polyvinyl Alcohol (PVA), Polypropylene (PP), Polyethylene (PE), or a combination thereof; and
where the fine aggregate comprises sugar cane bagasse ash (SCBA).

11. The concrete product of claim 10 , wherein the SCBA has been subjected to controlled burning and has a mean particle size ranging from 1 to 1000 μm.

12. The concrete product of claim 10 , wherein the SCBA is raw SCBA having a mean particle size from about 1 to 1000 μm.

13. The concrete product of claim 10 , wherein the fine aggregate further comprises fine silica sand having a mean particle size of about 1 to 3000 μm.

14. The concrete product of claim 10 , wherein the fine aggregate comprises SCBA and fine silica sand in a ratio of about 1:20 to about 1:0 by weight.

15. The concrete product of claim 10 , further comprising water, high range water reducer, or a combination thereof.

Assignees

• Univ Louisiana State

Inventors

• Arce Gabriel Andres
• Hassan Marwa
• Noorvand Hassan
• Rupnow Tyson
• Barbato Michele

Classifications

• Y02A30/30

  in transportation, e.g. on roads, waterways or railways · CPC title

• C04B28/02 Primary

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B16/0633

  Polypropylene · CPC title

• C04B18/24 Primary

  Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper {, cork} · CPC title

• C04B16/0641

  Polyvinylalcohols; Polyvinylacetates · CPC title