BINDERS FOR BUILDING MATERIALS, MANUFACTURING PROCESS THEREFOR AND INSTALLATION FOR CARRYING OUT THIS PROCESS

The invention relates to a binder for building materials consisting of cement and mineral grinding additives, said grinding additives containing ash of burned refuse, characterized in that, relative to the binder, the ash of burned refuse has a weight percent of 0.005 to 0.4 and a Blaine specific surface area of 1500 cm2/g to 6000 cm2/g. The invention further relates to a process and to a plant for carrying out the process for production of a binder for building materials comprising cement and mineral grinding additives, said grinding additives containing ash of burned refuse, said process being characterized by the steps of: preparing the ash of burned refuse provided as grinding additive by separating out the fraction having a particle size less than 1 mm and the oversize particles having a particle size greater than 40 mm; pre-crushing the ash of burned refuse which has been freed from the undersize particles and the oversize particles; removing ferrous and non-ferrous metals; further crushing of the pre-crushed ash of burned refuse which has been substantially freed from metals, in order to achieve a Blaine specific surface area from 1500 cm2/g to 6000 cm2/g, the ash of burned refuse prepared in this way being added to the cement before and/or after the further crushing of the ash of burned refuse which has been pre-crushed and substantially freed from metals.