Self-setting cement foam

Abstract

A self-setting porous cement foam includes a protein foam as the structuring agent and has pores when set and a water absorption coefficient of between 0.5 and 7 kg/(m 2 ·h0.5). A foam gun for producing a structure-imparting foaming component of a cement foam has a tubular design, an inlet orifice for a liquid and an inlet orifice for a gas or gas mixture. At least one first mesh is disposed downstream of the inlet orifices for the liquid and the gas or gas mixture and at least one second mesh is disposed in front of an outlet orifice from the foam gun. Disposed in the space between the at least one first mesh and the at least one second mesh is at least one foaming element having baffle structures specifically designed to create a turbulent flow between the at least one first mesh and the at least one second mesh.

What is claimed is: 
     
         1 . A foam gun for producing a structure-imparting foaming component of a cement foam, the foam gun being of a tubular design, wherein the foam gun has an inlet orifice for a liquid and an inlet orifice for a gas or gas mixture, and at least one first mesh is disposed downstream of the inlet orifices for the liquid and the gas or gas mixture and at least one second mesh is disposed in front of an outlet orifice from the foam gun and, disposed in the space between the at least one first mesh and the at least one second mesh is at least one foaming element having a plurality of baffle structures specifically designed to create a turbulent flow between the at least one first mesh and the at least one second mesh. 
     
     
         2 . The foam gun according to  claim 1 , wherein its cross-section tapers towards the inlet orifice for the liquid, and the inlet orifice for the gas or gas mixture is disposed in a flank of a portion tapering towards the inlet orifice for the liquid. 
     
     
         3 . The foam gun according to  claim 1 , wherein the space between the at least one first mesh and the at least one second mesh is fully occupied by the at least one foaming element. 
     
     
         4 . A device for producing a self-setting cement foam, wherein the device has a foam gun according to  claim 1 , and an outlet orifice of the foam gun is connected to a mixing chamber in which the cement paste is mixed with the protein foam to produce the cement foam.