Shotcrete dry mix and shotcrete and process for their preparation

摘要

The invention is based on the object to provide a starting mixture for the production of a shotcrete and a shotcrete and associated production processes, wherein on the one hand the shotcrete has an exact and evenly distributed amount of air voids and thus improved frost and Taumittelbeständigkeit and wherein on the other hand, the starting mixture in the dry spraying process and is particularly easy to process and inexpensive to produce. The object is achieved by a sprayed concrete dry mix, comprising a cement-based binder and an aggregate, wherein the shotcrete dry mixture comprises air-pore-forming agent, the air-entraining agents are zugebbar in the dry mixing process and wherein the air-entraining agents are hollow microspheres.