Hybrid and sustainable bio-composite construction repair material for construction enriched with MWCNT

Patent metadata

Field	Value
Publication number	US-12338176-B2
Application number	US-202418653717-A
Country	US
Kind code	B2
Filing date	May 2, 2024
Priority date	Sep 8, 2022
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A bio-composite plastering material and a method of making the same are provided. The bio-composite plastering material includes a mixture of sand-silica, Abelmoschus esculentus powder, and multi-walled carbon nanotubes. The bio-composite plastering material has increased compressive strength depending upon the concentration of Abelmoschus esculentus powder and multi-walled carbon nanotubes used. The method of making the bio-composite plastering material includes sieving the sand-silica to produce sand-silica of a uniform particle size, mixing powdered Abelmoschus esculentus powder with the sand-silica to produce a first mixture, mixing water with the first mixture to produce the bio-composite plastering material, and enhancing the bio-composite material by adding multi-walled carbon nanotubes. The bio-composite plastering material may then be plaster cast, such as by pressing the bio-composite plastering material in a hot press and drying the resulting bio-composite material in an oven.

First claim

We claim:

1. A bio-composite plastering material comprising
between about 5% and about 15% final dry weight percentage powdered Abelmoschus esculentus;
sand-silica; and
between about 0.25% by weight and 1% by weight multi-walled carbon nanotubes;

wherein the final dry weight percentage is the percentage of the final dry weight of the bio-composite plastering material.

2. The bio-composite plastering material as recited in claim 1 , wherein the bio-composite plastering material comprises about 5% final dry weight percentage powdered Abelmoschus esculentus.

3. The bio-composite plastering material as recited in claim 1 , wherein the bio-composite plastering material comprises about 10% final dry weight percentage powdered Abelmoschus esculentus.

4. The bio-composite plastering material as recited in claim 1 , wherein the bio-composite plastering material comprises about 15% final dry weight percentage powdered Abelmoschus esculentus.

5. The bio-composite plastering material as recited in claim 1 , wherein the sand-silica has an average diameter of between about 25 microns and about 850 microns.

6. The bio-composite plastering material as recited in claim 5 , wherein the sand-silica has an average diameter of about 250 microns.

7. The bio-composite plastering material as recited in claim 1 , wherein the bio-composite plastering material comprises about 0.25% by weight multi-walled carbon nanotubes.

8. The bio-composite plastering material as recited in claim 1 , wherein the bio-composite plastering material comprises about 0.5% by weight multi-walled carbon nanotubes.

9. The bio-composite plastering material as recited in claim 1 , wherein the bio-composite plastering material comprises about 0.75% by weight multi-walled carbon nanotubes.

10. The bio-composite plastering material as recited in claim 1 , wherein the bio-composite plastering material comprises about 1% by weight multi-walled carbon nanotubes.

11. A method of making the bio-composite plastering material of claim 1 comprising the steps of:
sieving sand-silica to produce sand-silica with particles of a uniform size;
mixing the sieved sand-silica with Abelmoschus esculentus powder to produce a first mixture;
mixing water with the first mixture to produce the bio-composite plastering material; and
enhancing the bio-composite plastering material by adding multi-walled carbon nanotubes to the bio-composite plastering material.

12. The method of claim 11 , comprising milling the sand-silica prior to the sieving step.

13. The method of claim 11 , comprising sieving the milled sand-silica to produce a sand-silica having an average diameter of 250 microns.

14. The method of claim 11 , comprising plaster casting the bio-composite plastering material.

15. The method of claim 14 , wherein the plaster casting comprises pressing the bio-composite plastering material in a hot press and drying the bio-composite plastering material in an oven.

16. The method of claim 11 , comprising mixing the sieved sand-silica with about 5% Abelmoschus esculentus powder.

17. The method of claim 11 , comprising mixing the sieved sand-silica with about 10% Abelmoschus esculentus powder.

18. The method of claim 11 , comprising mixing the sieved sand-silica with about 15% Abelmoschus esculentus powder.

19. The method of claim 11 , wherein enhancing the bio-composite plastering material comprising adding between about 0.25% by weight and 1% by weight multi-walled carbon nanotubes to the bio-composite plastering material.

20. The method of claim 11 , wherein the mixing water with the first mixture further comprises gradually spraying water on the first mixture until it becomes a homogenous mixture.

Assignees

• Univ United Arab Emirates

Inventors

• Ahmed Waleed Khalil
• Al-Marzouqi Ali H
• Al Mazrouei Noura Juaan Mubarak

Classifications

• C04B40/0046

  characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures · CPC title

• C04B40/0259

  Hardening promoted by a rise in pressure (C04B40/024 takes precedence) · CPC title

• C04B40/0263

  Hardening promoted by a rise in temperature (C04B40/024 takes precedence) · CPC title

• C04B2111/72

  Repairing or restoring existing buildings or building materials · CPC title

• C04B14/026

  of particular shape, e.g. nanotubes · CPC title