Method and device for the production of concrete
OwnerErich Lindner, Dieter Reichel +2inventors
InventorsErich Lindner, Dieter Reichel, Jens Tauchmann, Thomas Weichmann
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Abstract
The water necessary for the production of concrete is replaced by a super-cooled, cooling transfer agent, comprising snow crystals. The cooling transfer agent is produced by mixing water with air and a cooling medium, such as liquid nitrogen, to give a cold gas mixture. The cold gas mixture is sprayed in the form of a cold gas stream. The snow crystals thus formed from the water are brought to a low temperature, of, for example, below minus 30° C. and added to the mixture of binding agents.
Claims10
A method to produce concrete, in which a binder, such as cement, is mixed together with aggregates to form a binder mixture (Z) and then fresh concrete is made by adding water to the binder mixture (Z),
- characterized in that
- the water that is added to the binder mixture (Z) is at least in part in the form of a cold transfer agent (S) consisting of snow crystals.
The method according to one of the preceding claims, characterized in that nitrogen and/or air is employed as the propellant for the cold gas mixture.
A device to prepare concrete, comprising
- a mixing device (7) to mix the water, the propellant and a coolant to form a cold gas mixture,
- a spray nozzle (8) that is housed in a spraying chamber (9) and that is flow-connected to the mixing device (7), said spray nozzle (8) being used to spray the cold gas mixture so as to form a cold transfer agent (S) that at least largely consists of snow crystals, and
- a mixing chamber (2) in which the cold transfer agent (S) generated in the spraying chamber (9) can be mixed together with a binder mixture (Z).
Dependencies are inferred from the claim text.