Abstract: A raw mixture for the production of a cement clinker which consists of lime, argillaceous and ferrous components and a mixture of chlorides of calcium, potassium and sodium, the components being contained in the following proportions, percent by mass:lime component: 55 to 63argillaceous component: 23 to 17ferrous component: 4 to 1calcium chloride: 17.8 to 4potassium chloride: 0.1 to 7.5sodium chloride: 0.1 to 7.5.The raw mixture is useful in the low-temperature processes for production of cement. The use of the raw mixture according to the present invention makes it possible to utilize alkali-containing raw materials (soda production wastes, cement dust recycle).

Abstract: A raw mixture is provided for the production of a refractory high-alumina cement which consists of a calcareous component, an aluminous component and a chloride of at least one of the metals selected from the group consisting of magnesium, calcium, barium, strontium, sodium, potassium; the components are present in the raw mixture in the following amounts, percent by mass:aluminous component (calculated for Al.sub.2 O.sub.3): 69 to 73calcareous component (calculated for CaO): 11 to 23chlorides of said metals: 20 to 4.

Abstract: A raw mixture for the production of a cement clinker which consists of lime, argillaceous and ferrous components and a mixture of chlorides of calcium, potassium and sodium, the components being contained in the following proportions, percent by mass:lime component --55 to 63argillaceous component --23 to 17ferrous component --4 to 1calcium chloirde --17.8 to 4potassium chloride --0.1 to 7.5sodium chloride --0.1 to 7.5.The raw mixture is useful in the low-temperature processes for production of cement. The use of the raw mixture according to the present invention makes it possible to utilize alkali-containing raw materials (soda production wastes, cement dust recycle).

Abstract: Cement is disclosed having the following composition, in percent by weight: 20 to 75% of highly basic calcium chlorosilicate, 10 to 55% of calcium chloro-orthosilicate, 0.5 to 30% of calcium chloroaluminate, 2 to 20% of calcium chloroalumoferrite; cement of the foregoing compositions is produced by calcining at a temperature within the range of from 1,000.degree. to 1,200.degree. C. a raw mixture containing a calcareous component, silicaceous component, aluminous component, ferrous component, magnesium-containing component and calcium chloride in particular proportions, and then grinding the resultant cement clinker. This cement features a reduced heat emission in the initial stage of the hydration process and possesses a high activity. No corrosion of steel reinforcement is observed in concretes produced from the present cement. The cement can be used in heavy-duty concrete structures such as hydropower dams, in the production of high-strength concretes and ferroconcrete structures.

Abstract: A cement is disclosed having the following composition in per cent by weight:______________________________________ (I) clinker minerals: (a) a highly-basic calcium chlorosilicate 35 to 75 (b) calcium chloro-orthosilicate 10 to 55 (c) calcium chloroaluminate 2 to 30 (d) calcium chloroalumoferrite 4 to 16 (2) calcium oxychloride 0.5 to 2 (3) calcium chloride chemisorbed on the clinker materials 1.2 to 2.