# US 7,407,615 B2 · Method for producing concrete or mortar using a vegetal aggregate

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- Number: US 7,407,615 B2
- Document ID: US7407615B2
- Status: Granted
- Kind: B2
- Application number: 10/344,102
- Filed: 2001-08-07
- Published: 2005-01-06
- Granted: 2008-08-05
- Earliest claimed: 2000-08-09
- Assignees: Miscanthus-Holding, S.A.
- Inventors: Heribert Hohn
- Web page: https://patentgrep.com/patent/US7407615B2

## CPC

- C04B 18/248: {from specific plants, e.g. hemp fibres}
- C04B 28/04: Portland cements
- Y02W 30/91: Use of waste materials as fillers for mortars or concrete
- 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
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

A method for producing concrete or mortar based on an exclusively vegetal aggregate, a mineral binding agent, and mixing water is described. Instead of the vegetal aggregate being premineralized in a separate step of the operation, 4 to 14 kg of a non-hydratizable, finely ground mineralizator is added for each cubic meter of vegetable aggregate when the concrete or mortar is being mixed. Raw calcium carbonate is a preferred mineralizator.

## Claims

### Claim 1

Method for producing concrete or mortar based on an exclusively vegetal aggregate, a mineral binding agent, and mixing water, the vegetal aggregate having a specific weight of 80 to 160 kg/m3, as measured at a residual moisture of approximately 15%, characterized in that 4 to 14 kg of a non-hydratizable, finely ground mineralizator is added for each cubic meter of the vegetal aggregate when the concrete or mortar is being mixed.

### Claim 2 (depends on 1)

Method as defined in claim 1, characterized in that the mineralizator is a finely ground stone dust.

### Claim 3 (depends on 1)

Method as defined in claim 1, characterized in that at least 80%-mass of the mineralizator that is added has a grain size of less than 0.09 mm.

### Claim 4 (depends on 1)

Method as defined in claim 1, characterized in that the mineralizator essentially includes raw calcium carbonate.

### Claim 5 (depends on 1)

Method as defined in claim 1, characterized in that the mineral binding agent includes Portland cement.

### Claim 6 (depends on 1)

Method as defined in claim 1, characterized in that the mineral binding agent is a mixture of Portland cement and white lime.

### Claim 7 (depends on 1)

Method as defined in claim 1, characterized in that between 180 and 400 kg of mineral binding agent is added for each cubic meter of the vegetal aggregate.

### Claim 8 (depends on 1)

Method as defined in claim 1, characterized in that the mixing ratio of mineralizator to mixing water amounts to 25 kg to 50 kg of mineralizator to 1,000 kg of water.

### Claim 9 (depends on 1)

Method as defined in claim 1, characterized in that the vegetal aggregate is composed for the most part of fibrous particles with diameters equal to or less than 5.0 mm.

### Claim 10 (depends on 9)

Method as defined in claim 9, characterized in that a light concrete or a light wash floor is produced, the vegetal aggregate comprising fibrous particles with the lengths ranging from 5 mm to 40 mm.

### Claim 11 (depends on 9)

Method as defined in claim 9, characterized in that a light plaster or thermal insulation plaster is produced, the vegetal aggregate comprising fibrous particles with lengths of less than 5 mm.

### Claim 12 (depends on 1)

Method as defined in claim 1, characterized in that coniferous wood, hemp and/or reeds are used during the production of the vegetal aggregate.

### Claim 13 (depends on 1)

Method as defined in claim 1, characterized in that plants of the Miscanthus family are used for the production of the vegetal aggregate.

### Claim 14 (depends on 13)

Method as defined in claim 13, characterized in that the plant Miscanthus Giganteus is used for production of the vegetal aggregate.

### Claim 15 (depends on 1)

Method as defined in claim 1, characterized in that the method is used for producing light concrete, light mortar, light wash floor, as well as light plaster and thermal insulation plaster.