Abstract: The fire-protection material for constructions made of concrete and prestressed concrete, especially for tunnels, in the form of prefabricated plates or sprayed-on and cured coatings is prepared from hydraulically curing compositions containing aluminous cement, optionally in admixture with Portland cement, fillers and, if desired, fibers, curing accelerators, curing delayers, plasticizing agents and foaming agents, wherein the cured material contains less than 5% by weight of ettringite and wherein the composition contains from 50 to 200 weight parts of aluminous cement and from 10 to 250 weight parts of xonotlite in the uncured composition.

Abstract: The microporous heat insulation body consists of a compressed heat insulation material containing from 30 to 90% by weight of a finely divided metal oxide, from 0 to 30% by weight of an opacifier, from 0 to 10% by weight of an inorganic fibrous material, and from 0 to 15% by weight of an inorganic binder, and additionally from 2 to 45% by weight, preferably from 5 to 15% by weight of xonotlite.

Abstract: The microporus heat insulation body consists of a core of a compressed heat insulation material containing from 30 to 90% by weight of a finely divided metal oxide and further additives, wherein one or both surfaces thereof have a cover of a heat-resistant material and where the covers are the same or different and at least one side consists of prefabricated mica sheets.