Inorganic binder systems for the production of chemically resistant construction chemicals

摘要

An inorganic binder system comprising from 10 to 30 parts by weight of at least one latent hydraulic binder selected from blast furnace slag, slag sand, crushed slag, electrothermal phosphorus slag and steel slag, 5 to 22 parts by weight of at least one amorphous silica selected from precipitated silica, pyrogenic silica, microsilica and glass powder, from 0 to 15 parts by weight of at least one reactive load selected from lignite fly ash, mineral coal fly ash, metacaolin, volcanic ash , tuff, trass, pozzolana and zeolites, and 3 to 20 parts by weight of at least one alkali metal silicate selected from compounds having the empirical formula m SiO2 · n M2O, in which M represents Li, Na, K or NH4, or one of its mixtures, preferably Na or K, and the molar ratio of m: n is = 3.6, preferably = 3.0, more preferably = 2.0, in particular = 1, 70 and most preferably = 1.20, in d where the binder system comprises from 12 to 25% by weight of CaO, where 10 to 50 parts by weight, preferably 20 to 40 parts by weight of water are required for setting, and where the latent hydraulic binder, the Amorphous silica and the optional reactive filler are present as a first component and the alkali metal silicate together with at least the amount of water required for setting are present as a second component.