The invention relates to a method for producing a spray concrete or spray mortar, in which a premixture of binders and fine-grained additive is produced, which is transported to the building site and before the location of this premix is mixed with a coarse-grained additive, wherein the coarse aggregate from the near environment of the building site is transported. The present invention also relates to a device with which quickly and exactly two mixtures of substances can be mixed with one another.
展开▼