IP Library › Granted Patent US 12,241,017
Granted Patent B2
US 12,241,017 · App. 18/046,259 · Granted Mar 4, 2025

High durability engineered cementitious composites with polymer fibers

Inventors: Mohammed Al Mehthel (Dhahran, SA); Victor Li (Ann Arbor, MI); He Zhu (Ann Arbor, MI); Thibault Villette (Khobar, SA); Waleed Nasser (Ad Dammam, SA); Oscar Salazar Vidal (Dhahran, SA)
Assignees: SAUDI ARABIAN OIL COMPANY; University of Michigan
C09K8/467C04B7/323C04B14/068C04B16/0633C04B18/146C04B18/22C04B28/065
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Quick Facts
Patent No.
US 12,241,017
App. No.
18/046,259
Granted
Mar 4, 2025
Kind
B2
Abstract

An engineered cementitious composite (ECC) has a tensile strain capacity ranging from 8.6 to 12.5% and includes a cement precursor, unprocessed desert sand, and polymer fibers. The polymer fibers may be ultra-high molecular weight polyethylene fibers, polypropylene fibers, or a combination thereof. A method of preparing an ECC structure includes providing a cementitious precursor mixture including a cement precursor and unprocessed desert sand, introducing water into the cementitious precursor mixture to form a cement slurry, and adding polymer fibers to the cement slurry. The polymer fibers may be ultra-high molecular weight polyethylene fibers, polypropylene fibers, or a combination thereof. Then, the method includes forming a structure with the cement slurry and curing the cement slurry.

Claims (20)

1. An engineered cementitious composite (ECC) comprising:

a cement precursor;

unprocessed desert sand from at least two distinct native environments having an average particle size ranging from 200 to 600 micrometers (μm), each native environment having unprocessed desert sand of a different average particle size; and

ultra-high molecular weight polyethylene fibers and polypropylene fibers,

wherein the ultra-high molecular weight polyethylene fibers and polypropylene fibers are included in a ratio ranging from 10:1 to 1:10, and

wherein the ECC has a tensile strain capacity ranging from 8.6 to 12.5%.

2. The ECC of claim 1 , wherein the cement precursor is included in an amount ranging from 14 to 40 wt %, based on a total weight of the ECC.

3. The ECC of claim 1 , wherein the unprocessed desert sand is included in an amount ranging from 20 to 45 wt %, based on a total weight of the ECC.

4. The ECC of claim 1 , wherein the polymer fibers comprise ultra-high molecular weight polyethylene fibers that are included in an amount ranging from 0.2 to 10 wt %, based on a total weight of the ECC.

5. The ECC of claim 1 , wherein the cement precursor comprises calcium sulphoaluminate cement.

6. The ECC of claim 1 , wherein the polymer fibers comprise ultra-high molecular weight polyethylene fibers and wherein the ultra-high molecular weight polyethylene fibers have an average diameter of about 16 to 30 μm and an average length of about 4 to about 20 mm.

7. The ECC of claim 1 , wherein the polymer fibers are polypropylene fibers and are included in an amount ranging from 0.1 to 0.5 wt %, based on the total weight of the ECC.

8. The ECC of claim 1 , wherein the polymer fibers are polypropylene fibers and wherein the polypropylene fibers have an average diameter of about 8 to 20 μm and an average length of about 5 to about 15 mm.

9. The ECC of claim 1 , further comprising crumb rubber in an amount of 0.1 to 2.0 wt %, based on a total weight of the ECC.

10. The ECC of claim 9 , wherein the crumb rubber is superfine crumb rubber having an average particle size ranging from 75 to 150 microns.

11. The ECC of claim 9 , wherein the crumb rubber is ultrafine crumb rubber having an average particle size of less than 75 microns.

12. The ECC of claim 1 , further comprising volcanic ash in an amount ranging from 20 to 40 wt %, based on a total weight of the ECC.

13. The ECC of claim 12 , wherein the volcanic ash comprises an average particle size ranging from 50 to 120 μm.

14. The ECC of claim 12 , further comprising silica fume in an amount ranging from 3.0 to 6.0 wt %, based on a total weight of the ECC.

15. The ECC of claim 1 , wherein the ECC has a tensile strength ranging from 6 to 9 MPa.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 11, 2023
From: LI, VICTOR; ZHU, HE
To: UNIVERSITY OF MICHIGAN
Reel/Frame 063291/0061 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 11, 2023
From: VILLETTE, THIBAULT; MEHTHEL, MOHAMMED AL; NASSER, WALEED; VIDAL, OSCAR SALAZAR
To: SAUDI ARABIAN OIL COMPANY
Reel/Frame 063291/0067 →
Continuity (1)
Related Publication 20240132770A1 · Apr 25, 2024
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