Calcium silicate granules forming a microporous structure

Calcium silicate granules having a polyamide wax addition, produced by a process comprising the steps of:

• (a) dispersing crystalline and optionally amorphous silicon dioxide, or a material containing the same, and calcium oxide, or a material containing the same, the molar ratio of calcium oxide to silicon dioxide being 0.1:1 to 1.1:1 and a polyamide wax, and mixing with a microporous, stable foam produced in water by means of an anionic, surface-active substance, accompanied by the formation of a foam,
• (b) shaping the foam mixture prepared in step (a),
• (c) autoclave hardening,
• (d) comminuting,
• (e) drying, and
• (f) grading into particles.

Calcium silicate granules having a fatty amine addition of 0.05 to 0.5% by weight of fatty amine, based on the solid mixture quantity used and calculated as dry weight, produced by the steps comprising:

• (a) dispersing crystalline and optionally amorphous silicon dioxide, or a material containing the same, and calcium oxide, or a material containing the same, the molar ratio of calcium oxide to silicon dioxide being 0.8:1 to 1.1:1, and fatty amine, and mixing with a microporous, stable foam produced in water by means of an anionic, surface-active substance, accompanied by the formation of a foam comprising calcium silicate,
• (b) shaping the foam mixture prepared in step (a),
• (c) autoclave hardening,
• (d) comminuting,
• (e) drying, and
• (f) grading into particles.

Calcium silicate granules having a fatty amine salt addition, produced by the steps comprising:

• (a) dispersing crystalline and optionally amorphous silicon dioxide, or a material containing the same, and calcium oxide, or a material containing the same, the molar ratio of calcium oxide to silicon dioxide being 0.8:1 to 1.1:1, and fatty amine salt, mixing in a microporous, stable foam produced in water by means of an anionic, surface-active substance, accompanied by the formation of a foam comprising calcium silicate,
• (b) shaping the foam mixture prepared in step (a),
• (c) autoclave hardening,
• (d) comminuting,
• (e) drying, and
• (f) grading into particles.

Calcium silicate granules having a saponification-resistant alkoxy silane addition, produced by the steps comprising:

• (a) dispersing crystalline and optionally amorphous silicon dioxide or a material containing the same, and calcium oxide, or a material containing the same, the molar ratio of calcium oxide to silicon dioxide being 0.8:1 to 1.1.:1 and mixing with a microporous, stable foam produced in water by means of an anionic, surface-active substance, accompanied by the formation of a foam,
• (b) shaping the foam mixture prepared in step (a),
• (c) autoclave hardening,
• (d) drying,
• (e) adding saponification-resistant alkoxy silane selected from the group consisting of alkyl alkoxy silanes, whose branched or straight chain alkyl radicals has 1 to 6 carbon atoms and whose branched or straight chain alkoxy radicals have 1 to 3 carbon atoms and phenyl alkoxy silanes, whose alkoxy radical has 1 to 3 carbon atoms or mixtures thereof,
• (f) classifying.