Masse für die Befestigung von Dübeln u.dgl. in Hohlräumen von Beton, Stein und Ziegelmauerwerk, auf Basis Wasserglas, und Verfahren zur Herstellung der Masse

摘要

The composition for fixing plugs, threaded rods and the like in holes, in particular drilled holes, in concrete, stone and masonry, based on water glass, containing at least one fine, highly active reactant such as, for example, SiO2 and/or Al2O3, in particular from waste materials, and also containing fillers such as, for example, quartz flour and/or quartz sand, is characterised in that the water glass, in particular potash water glass, has a molar ratio of SiO2 to alkali metal oxide of > 1.4, preferably 1.45 - 1.60, but in any case < 2, and that the composition additionally contains, as hardener, based on 100 parts by weight of water glass, 10-40 parts by weight, preferably 20-30 parts by weight of a compound which neutralises the alkali of the water glass by elimination of an acid which is stronger than silicic acid. The hardener is, in particular, ethylene carbonate, propylene carbonate and/or butylene carbonate. It is advantageous to add to the composition, based on 100 parts by weight of water glass, about 20-40 parts by weight, preferably about 30-35 parts by weight, of a, preferably inorganic, thixotrope, e.g. a bentonite activated by alkali, and also about 10-40 parts by weight, preferably about 20-30 parts by weight, of a fluidiser, in particular a silane emulsion.