Abstract: A fireproof, waterproof, and acidproof binder is characterized by a hardened composition of 10-90% by weight of alkali silicate comprising sodium waterglass, potassium waterglass or a mixture of the same, 1-40% by weight of reactive metal oxide from the group comprising magnesium, titanium, and zinc, preferably magnesium oxide, 1-70% by weight of calcium/magnesium carbonate, preferably dolomite, and, if desired, magnesium silicate, feldspar, a chemically active silica, potassium-sodium-aluminum silicate, sodium carbonate, expanded clay, wood fibers, cement, limestone dust, sand, an organic binder, water or mixtures of the same.

Abstract: A method for making a water and fire resistant building material of a layered, shaped and hardened composition of one or more absorbant components, magnesia cement, chemically active fumed silica, alkali silicate, one or several inorganic fillers, one or several lignin sulphonates, eventually ethyl silicate, whereby the final product is built up of a two binder system, one of fumed silica, alkali silicate and optionally magnesium oxide and the other of magnesia cement and a lignin sulphonate salt. The method of producing the product includes forming a dual layered binder system having a very short press time.

Abstract: The application concerns a water and fire resistant building material consisting of a layered, shaped and hardened composition of one or more absorbant components, magnesia cement, chemically active fumed silica, alkali silicate, one or several inorganic fillers, one or several lignin sulphonates, eventually ethyl silicate, whereby the final product is built up of a two binder system, one consisting of fumed silica, alkali silicate and possibly magnesium oxide and the other consisting of magnesia cement and a lignin sulphonate salt. The application also concerns the method of producing the product. The procedure is characterized by forming a dual layered binder system and by having a very short press time.