MATERIAL FOR IMPERVIOUS WALLS, CONSISTING OF AN ACTIVATED CLAY MINERAL POWDER WITH A HYDRAULIC BINDING AGENT

摘要

The invention relates to a material for impervious walls, consisting of a fine mineral powder mixed with a hydraulic binding agent, said fine mineral powder having the following state variables:, a particle size of essentially up to 0.1 mm; a density of 900 to 1200 kg/m<3>; 7-12 % water; 0.5-3.5 wt. % Na2O; and a specific surface per volume of particles of essentially 0.25 to 0.5 m<2>/cm<3>. The fine mineral powder is quick-dried into a microporous state. The corresponding cement contains slag sand or blast furnace slag or trass and Portland clinker and is mixed with the fine mineral powder in a one- or two-stage process. The inventive preparation of the fine mineral powder results in a wide scope of application and overcomes limitations regarding the starting materials.