Process for mixing a dry mix and water in dry spraying, and mixing tube for the dry spraying process

摘要

In the process for mixing dry mix and water in dry spraying, in particular a dry concrete spraying process, said dry mix is mixed with an air/water mix, flowing out of injection ducts transversely with respect to the axial direction, and mixed thoroughly in a mixing tube through which there is axial flow of the dry mix. The pre-mixing of air and water is carried out before the air/water mix is discharged into the interior of the mixing tube.