Activated argillaceous mineral powder material, drying process for manufacture thereof and sealing compound for walls

摘要

The invention relates to fine mineral powder with the following state variables:, a particle size of essentially up to 0.1 mm; a density of 0.9 to 1.2 kg/l; water content 7 to 12 percent by weight; 0.5 to 3.5 percent by weight of Nai2O; and a specific surface per volume of particles of essentially 0.25 to 0.5 me2/cme3. The fine mineral powder is quick-dried into a microporous state. The evaporation-drying process is carried out over a short residence time and at a low product temperature, preferably with an inlet temperature of 300 to 700 degC and an outlet temperature less than or equal to 85 degC, without exceeding a safe inner particle temperature of approximately 60 degC. The resulting microporous fine grit has defined material properties, is stable in cement and forms along with various types of cement an excellent sealing compound for walls.