Porosifying, solidification-accelerating additive for binding agent building materials, and process of producing

This application claims priority to German Patent Application Serial No. 100 40 582.7-45, filed Aug. 15, 2000, entitled "Porosierender, erstarrungs beschleunigender Bindemittelbaustoff-Zusatz und Verfahren zu seiner Herstellung." A porosifying, solidification-accelerating additive for binding agent building materials consisting of AlO, 50-90%; MgO, 4-20%; SiO, 0.5-15%; AlN, 0.1-5%; FeO, 0.1-5%; CaO, 0.1-5%; F, 0.1-5%; NaO, 0.1-5%; KO, 0.1-2%; as well as in the form of metallic particles: Al, 0.1-10%; Si, 0.1-3%; Fe, 0.1-3%; balance in total maximum, 5%; annealing losses, 0.1-15%; and of mineral main constituents in the form of corumdum ( -AlO) and spinel (MgO×AlO), wherein the metallic aluminum particles are enveloped by mineral transition modifications from aluminum hydroxide (AlO×3HO) to -aluminum oxide, the powder comprises a particle size of at least 90% smaller than 500 m, and the BET surface of the powder amounts to at least 10 m/g.