Hydrophobic cementitious composition

Abstract

The present invention relates to cement-containing compositions which are characterized in that they have a proportion of organosilicon compounds of greater than 0.15% by weight, based on the proportion of cement, the organosilicon compounds being based on at least one organosilicon compound selected from the group consisting of the alkoxysilanes and at least one selected from the group consisting of the alkoxysiloxanes, to a process for the preparation thereof and to the use thereof.

Description

technical field

[0001] The present invention relates to novel hydrophobized cementitious compositions and a process for their preparation. Background technique

[0002] Cementitious materials and compositions such as adhesives, concrete and building materials, precast concrete elements and concrete products that can be prepared from them, such as pipes, wall sections or paving slabs, are generally used in walls, floors, roofs or used to prepare them. The cementitious materials are often exposed to water, and since these materials are often porous, water can penetrate them. This inherent porosity can be reduced to a great extent by using suitable aggregates or additives and formulations prepared with them. However, complete avoidance of porosity is usually not achievable. Therefore, the industry as a whole is looking for ways to make said materials waterproof and thus waterproof. Two promising approaches have been demonstrated, one internal and one external. Said interna...

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