Abstract: A preparation contains an aqueous liquid part, a solid part comprising at least one silicate selected from tricalcium silicate Ca2SiO5 and dicalcium silicate Ca2SiO4; and calcium chloride CaCl2 and a water reducing agent which are both contained in at least one of the aforementioned parts. According to the invention, the solid part and the liquid part are intended to be mixed in order to obtain the material. The preparation can be used to restore a mineralized substance, particularly in the dental field.

Abstract: A preparation contains an aqueous liquid part, a solid part comprising at least one silicate selected from tricalcium silicate Ca3SiO5 and dicalcium silicate Ca2SiO4; and calcium chloride CaCl2 and a water reducing agent which are both contained in at least one of the aforementioned parts. According to the invention, the solid part and the liquid part are intended to be mixed in order to obtain the material. The preparation can be used to restore a mineralized substance, particularly in the dental field.

Abstract: Aggregate-forming suspensions containing a coagulant therefor, e.g., FeCl.sub.3, polyaluminum chloride or Al.sub.2 (SO.sub.4).sub.3, are coagulated/flocculated by stirring to provide mechanically strong flocs of greater average diameter size, without concomitant formation of irreversible microflocs, and wherein the stirring regime, in at least the initial stage of coagulation/flocculation, includes an initial operating stirring cycle comprising (i) a rapid stirring sequence at an average velocity gradient ranging from 300 to 1,000 s.sup.-1 for a period of time ranging from 30 to 200 seconds, and (ii) a slow stirring sequence at an average velocity gradient ranging from 40 to 100 s.sup.-1 for a period of time ranging from 5 to 40 minutes.