The present invention relates to a solid composition comprising:

- a calcium silicate powder,

- a set accelerator in the form of a powder,

- a reinforcing filler in a solid form,

- a radio-opacifying agent in a solid form,

- at least one complementary ingredient selected from solid fibers or solid porous fillers,

- optionally a water-reducing agent in a solid form, and

- optionally solid pigments.

The present invention also relates to a kit of parts for the preparation of a composition suitable for use in dentistry comprising in a first container a solid phase including the solid composition according to the invention, and in a second container an aqueous phase. The present invention also relates to a method for preparing a dental cement, including mixing the solid composition of the invention with an aqueous phase and to resulting dental cement.

Die vorliegende Erfindung betrifft die Verwendung eines Aminoalkohols A und/oder eines Salzes des Aminoalkohols A als Additiv beim Mahlen mindestens eines Feststoffs, wobei der Aminoalkohol A eine Struktur gemäss Formel I aufweist: und wobei

a) R¹ und R² unabhängig voneinander je eine Alkanolgruppe mit 2 - 4 Kohlenstoffatomen darstellen, und

b) R³ ein Kohlenwasserstoffrest mit 1 - 8 Kohlenstoffatomen ist, und

c) R³ verschieden ist von R¹ und/oder R².

Compositions and methods for increasing grinding efficiency of cement, cement clinker, raw materials for cement, and other inorganic particles. Use of biomass-derived polyols such as diols, triols, or mixtures thereof, optionally with a conventional grinding aid, cement quality improver, and/or hexavalent chromium reducer, are believed to provide less risk of sludging when compared to glycerides obtained from fossils fuel sources.

Compositions and methods for increasing grinding efficiency of cement, cement clinker, raw materials for cement, and other inorganic particles. Use of biomass-derived polyols such as diols, triols, or mixtures thereof, optionally with a conventional grinding aid, cement quality improver, and/or hexavalent chromium reducer, are believed to provide less risk of sludging when compared to glycerides obtained from fossils fuel sources.

For the production of a shaped article a composite material is used which leads to a shaped article comprising a coherent matrix, the matrix comprising

• A) homogeneously arranged bodies of a size of from about 50 A to about 0.5µ, or a coherent structure formed from such homogeneously arranged particles, (14) and
• B) densely packed bodies (10,12) having a size of the order of 0.5 - 100 µ and being at least one order of magnitude larger than the respective particles stated under A), or a coherent structure formed from such densely packed particles,

The bodies A (14), and B (10,12) may, according to the invention, be bodies of a gas, a liquid or a solid.

In order to further improve the strengths and other properties of the shaped article it optionally additionally comprises embedded in the matrix,

C) compact-shaped solid particles of a material having a strength exceeding that of ordinary sand and stone used for ordinary concrete,

said particles having a size of 100 p - - 0.1 m.

The shaped article may further optionally comrise D) additional bodies which have at least one dimension which is at least one order of magnitude larger than the particles A.