# US 12,109,663 B2 · Method in dry-shake coating of a concrete floor

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- Number: US 12,109,663 B2
- Document ID: US12109663B2
- Status: Granted
- Kind: B2
- Application number: 17/298,244
- Filed: 2019-09-03
- Published: 2022-03-24
- Granted: 2024-10-08
- Earliest claimed: 2018-11-30
- Assignees: Concria Oy
- Applicants: Concria Oy
- Inventors: Mika Ahonen
- Web page: https://patentgrep.com/patent/US12109663B2

## CPC

- B24B 1/00: Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B 7/18: for grinding floorings, walls, ceilings or the like (machines or devices for cleaning floorings A47L11/00, A47L13/00)
- B24B 7/22: for grinding inorganic material, e.g. stone, ceramics, porcelain
- C04B 41/009: {characterised by the material treated}
- C04B 41/5089: {Silica sols, alkyl, ammonium or alkali metal silicate cements}
- C04B 41/52: Multiple coating or impregnating {multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation}
- C04B 41/70: for obtaining at least two superposed coatings having different compositions
- E04F 15/12: Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo {gypsum floors}(inorganic or bituminous masses C04B; organic plastic masses C08L)
- C04B 41/00: After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone (conditioning of the materials prior to shaping C04B40/00; applying liquids or other fluent materials to surfaces, in general B05; grinding or polishing B24; apparatus or processes for treating or working shaped articles of clay or other ceramic compositions, slag or mixtures containing cementitious material B28B11/00; working stone or stone-like materials B28D; glazes, other than cold glazes, C03C8/00; etching, surface-brightening or pickling compositions C09K13/00)
- C04B 2111/60: Flooring materials
- E04F 21/247: {used by an operator sitting on the trowel, i.e. ride-on power trowels}
- B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- E04F: FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS (windows, doors E06B)

## Abstract

A method in dry shake coating of a concrete floor is provided. On top of the concrete floor two or more superimposed dry shake material layers are applied. The surface of an underlying dry shake layer is troweled prior to application of a next dry shake layer, whereafter the lastly processed dry shake layer of a concrete floor is troweled. The application of an underlying dry shake layer is followed by spreading over its surface a water soluble silica-based medium prior to and/or during the course of troweling this particular dry shake layer and prior to the application of an overlying dry shake layer.

## Claims

### Claim 1

A method in dry shake coating of a concrete floor, said method comprising:
spreading an underlying layer of dry shake material on top of the concrete floor surface;
spreading a colloidal silica-based medium over the surface of the underlying dry shake layer before and/or during troweling the dry shake layer and before applying a next dry shake layer;
troweling the surface of the underlying dry shake layer followed by applying the next dry shake layer;
troweling the lastly spread dry shake layer of the concrete floor; wherein
the colloidal silica-based medium enhances bonding between sequentially-applied dry-shake layers and enables increasing an overall thickness of the dry shake coating.

### Claim 2 (depends on 1)

A method according to claim 1, wherein the medium being spread on the underlying dry shake layer is a colloidal nanosilica-based medium.

### Claim 3 (depends on 2)

A method according to claim 2, further comprising spreading water soluble silica-based medium on the concrete floor surface before applying the dry-shake layer.

### Claim 4 (depends on 1)

A method according to claim 1, further comprising spreading additional dry shake lavers on top of each other, each layer being treated with a silica and/or nanosilica-based medium before and/or during troweling, wherein the final dry shake structure of the concrete floor comprises three or more dry shake layers.

### Claim 5 (depends on 1)

A method according to claim 1, further comprising diamond honing as the actual aftercare of the completed dry shake floor or subsequently conducted service or maintenance procedure for the dry shake floor.

### Claim 6 (depends on 1)

A method according to claim 1, further comprising spreading water soluble silica-based medium on the concrete floor surface before applying the dry-shake layer.