METHOD OF PROVIDING CHEMICALLY INERT CONCRETE

• US 20180086670A1
• Filed: 09/28/2016
• Published: 03/29/2018
• Est. Priority Date: 09/28/2016
• Status: Active Grant

• Current Assignee: Magneco/Metrel Inc.
• Original Assignee: Magneco/Metrel Inc.
• Inventors: Paulter, Dominic, ANDERSON, Michael W., BINZ, Lara, SNYDER, Daniel
• Granted Patent: US 10,577,280 B2
• Time in Patent Office: Days
• CPC Class Codes: C04B 14/06 Quartz; Sand
• CPC Class Codes: C04B 14/062 Microsilica, e.g. colloïdal silica preparing microsilica slurries or suspensions C04B18/148
• CPC Class Codes: C04B 14/10 Clay sepiolite C04B14/042; grog C04B18/025
• CPC Class Codes: C04B 14/22 Glass ; Devitrified glass
• CPC Class Codes: C04B 14/30 Oxides other than silica ferrites C04B14/363
• CPC Class Codes: C04B 20/008 Micro- or nanosized fillers, e.g. micronised fillers with particle size smaller than that of the hydraulic binder colloidal silica C04B14/062 ; silica fume C04B18/146
• CPC Class Codes: C04B 2111/00017 Aspects relating to the protection of the environment
• CPC Class Codes: C04B 2111/1037 Cement free compositions, e.g. hydraulically hardening mixtures based on waste materials, not containing cement as such
• CPC Class Codes: C04B 22/066 Magnesia; Magnesium hydroxide
• CPC Class Codes: C04B 28/005 containing gelatineous or gel forming binders, e.g. gelatineous Al(OH)3, sol-gel binders
• CPC Class Codes: C04B 28/24 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

Abstract

A method of providing a chemically inert concrete includes the steps of providing and mixing an aqueous colloidal silica dispersion with a quantity of glass particles. The chemically inert concrete includes, based on dry weight, about 50% to about 95% by weight of the glass particles and about 3% to about 40% by weight of the colloidal silica particles. The chemically inert concrete is substantially or totally free of Group I and Group II metal oxides, exclusive of the glass particles, and is substantially or totally free of cement.

Claims

1. A method of providing a chemically inert concrete, comprising steps of:

providing an aqueous colloidal silica dispersion including colloidal silica particles and water;

providing a quantity of glass particles; and

mixing the aqueous colloidal silica dispersion with the glass particles to provide a concrete composition;

wherein the concrete composition comprises, based on dry weight, about 50% to about 95% by weight of the glass particles and about 3% to about 40% by weight of the colloidal silica particles.

2. The method of claim 1, wherein the aqueous colloidal silica dispersion comprises about 30% to about 60% by weight of the colloidal silica particles and about 40% to about 70% by weight of the water, based on the weight of the aqueous colloidal silica dispersion.

3. The method of claim 1, wherein the glass particles are selected from the group consisting of soda-lime glass, lead glass, borosilicate glass, and combinations thereof.

4. The method of claim 1, further comprising the steps of applying the concrete composition to a substrate and evaporating the water from the concrete composition.

5. The method of claim 1, wherein the concrete composition further comprises, based on dry weight, about 3% to about 40% by weight of one or more additional ingredients selected from the group consisting of Si0₂, Al₂O₃, compounds thereof, and combinations thereof.

6. The method of claim 5, wherein the one or more additional ingredients comprise fuled silica having a median particle size of about 1 to about 50 microns.

7. The method of claim 1, wherein the concrete composition is substantially free of cement.

8. The method of claim 1, wherein the concrete composition is substantially free of Group I and Group II metal oxides.

9. A method of providing a chemically inert concrete, comprising the steps of:

providing an aqueous colloidal silica dispersion including about 30% to about 60% by weight colloidal silica particles and about 40% to about 70% by weight water, based on the weight of the aqueous colloidal silica dispersion;

providing a quantity of glass particles selected from the group consisting of soda-lime glass, lead glass, borosilicate glass, and combinations thereof; and

mixing the aqueous colloidal silica dispersion with the glass particles to provide a concrete composition;

wherein the concrete composition comprises, based on dry weight, about 50% to about 95% by weight of the glass particles, about 3% to about 40% by weight of the colloidal silica particles, and less than about 2.5% by weight cement.

10. The method of claim 9, further comprising the steps of applying the concrete composition to a substrate and evaporating the water from the substrate.

11. The method of claim 9, wherein the concrete composition comprises, based and dry weight less than about 1.5% by weight Group I and Group II metal oxides.

12. The method of claim 9, wherein the concrete composition comprises, based on dry weight, about 60% to about 90% by weight of the glass particles and about 5% to about 30% by weight of the colloidal silica particles.

13. The method of claim 9, wherein the concrete composition further comprises one or more additional ingredients selected from the group consisting of SiO₂, Al₂O₃, compounds thereof, and combinations thereof.

14. The method of claim 13, wherein the one or more additional ingredients comprise fused silica having a median particle size of about 1 to about 50 microns.

15. The method of claim 9, wherein the glass particles have a median particle size of about 0.05 mm to about 5 mm.

16. A method of providing a chemically inert concrete, comprising the steps of:

mixing glass particles with an aqueous colloidal silica dispersion to provide a concrete composition;

applying the concrete composition to a substrate; and

drying the concrete composition on the substrate;

wherein the concrete composition includes, based on dry weight, about 50% to about 95% by weight of the glass particles and about 3% to about 40% by weight of the colloidal silica particles.

17. The method of claim 16, wherein the substrate comprises a mold.

18. The method of claim 16, wherein the substrate comprises a flat surface.

19. The method of claim 16, wherein the substrate comprises a curved surface.

20. The method of claim 16, wherein the concrete composition is substantially free of cement and is substantially free of Group I and Group II metal oxides.