Hemp based geopolymer compositions and methods of use thereof

Patent metadata

Field	Value
Publication number	US-12528740-B2
Application number	US-202217816286-A
Country	US
Kind code	B2
Filing date	Jul 29, 2022
Priority date	Jul 29, 2021
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

Provided here are hemp-based concrete compositions and methods of production of these compositions. These compositions contain an aggregate containing coarse hemp hurd and an alkali-activated binder including a hemp powder derived from a woody core of a hemp plant.

First claim

What is claimed is:

1 . A hemp-based concrete composition comprising:
an aluminosilicate-based binder containing a first hemp derivative and ground granulated blast furnace slag; and an aggregate containing a second hemp derivative, the first and second derivatives having different particle dimensions and being derived from a woody core of a hemp plant.

2 . The composition of claim 1 , wherein the hemp-based concrete composition has a density of or less than 1.5 g/cm 3 .

3 . The composition of claim 1 , wherein the first hemp derivative is substantially hemp hurd powder.

4 . The composition of claim 1 , wherein the second hemp derivative is substantially hemp hurd.

5 . A hemp-based concrete composition comprising:
an aluminosilicate-based binder containing a hemp hurd powder, a mineral aggregate, and an alkali activator; and an aggregate containing a hemp derivative, the hemp derivative being derived from a woody core of a hemp plant and having different particle dimensions than the hemp hurd powder.

6 . The composition of claim 5 , wherein the mineral aggregate contains river sand, fly ash, or a combination thereof.

7 . The composition of claim 5 , wherein the alkali activator contains one or more of a silicate, a metal aluminate, an alkali-metal hydroxide, ammonium hydroxide, and an alkaline earth metal hydroxide.

8 . The composition of claim 5 , wherein the alkali activator contains sodium silicate and sodium hydroxide.

9 . The composition of claim 8 , wherein the alkali activator contains sodium silicate and sodium hydroxide at a ratio of 2.5:1.

10 . The composition of claim 8 , wherein the alkali activator contains sodium silicate and sodium hydroxide at a molality of 10 M.

11 . The composition of claim 5 , wherein the hemp hurd powder is present in the aluminosilicate-based binder at an amount ranging from about 1 wt. % to about 5 wt. %.

12 . A hemp-based concrete composition comprising:
an aluminosilicate-based binder containing a first hemp derivative; and an aggregate containing a second hemp derivative, the first and second derivatives having different particle dimensions and being derived from a woody core of a hemp plant, wherein the concrete composition has a compressive strength of or greater than 4 MPa.

13 . The composition of claim 12 , wherein the first hemp derivative is substantially hemp hurd powder.

14 . The composition of claim 12 , wherein the second hemp derivative is substantially hemp hurd.

15 . The composition of claim 12 , wherein the aluminosilicate-based binder further contains one or more of ordinary Portland cement (OPC), lime, zeolite, magnesium oxide cement, magnesium phosphate cement, and ground granulated blast furnace slag.

Assignees

• Nutech Ventures

Inventors

• Maguire Marc
• Mastali Mohammad

Classifications

• C04B28/24

  containing alkyl, ammonium or metal silicates; containing silica sols {(reaction mixtures resulting in mineral polymers C04B28/006; polymeric reaction products of alkali metal silicates with isocyanates C08G18/3895)} · CPC title

• C04B22/062

  of the alkali or alkaline-earth metals · CPC title

• C04B28/08

  Slag cements · CPC title

• C04B28/008

  Mineral polymers other than those of the Davidovits type, e.g. from a reaction mixture containing waterglass · CPC title

• C04B28/006

  containing mineral polymers, e.g. geopolymers of the Davidovits type · CPC title