RAPIDLY BINDING HIGH-STRENGTH CEMENT BINDING AGENT AND METHOD OF ITS PREPARATION

摘要

The present invention relates to a hydraulic binding agent with a controlled setting time and which attains high strength from the beginning of setting. The hydraulic binding agent is prepared from 85 to 99.89 % cement clinker, with the specific surface area of 150 to 3000 m2/kg and with 5 to 95 % by weight of particles smaller than 5 .mu.m, 0.01 to 10 % by weight of a salt of sulfomethylated condensation product of phenols with formaldehyde, up to 70 % acidic groups of which are occupied by a trivalent cation from the metal group comprising iron, aluminum and chromium in the amount of 0.01 to 5 % by weight related to the weight of ground cement, 0.1 to 10 % by weight of alkaline hydroxide, carbonate, hydrogencarbonate, silicate, hydrogensilicate, hydrogensulfite and oxalate, and at least 20 % by weight of formation water. The condensation product may be partly oxidized. The hydraulic binding agent is suitable for numerous purposes of building industry.