cementation

ce·men·ta·tion

C0193800 (sē′mĕn-tā′shən)n.1. The act, process, or result of cementing.2. A metallurgical coating process in which iron or steel is immersed in a powder of another metal, such as zinc, chromium, or aluminum, and heated to a temperature below the melting point of either.

cementation

(ˌsiːmɛnˈteɪʃən) n1. (Metallurgy) the process of heating a solid with a powdered material to modify the properties of the solid, esp the heating of wrought iron, surrounded with charcoal, to 750–900°C to produce steel2. the process of cementing or being cemented3. (Civil Engineering) civil engineering the injection of cement grout into fissured rocks to make them watertight

ce•men•ta•tion

(ˌsi mənˈteɪ ʃən, -mɛn-, ˌsɛm ən-)

n. 1. the act, process, or result of cementing. 2. the heating of two substances in contact in order to effect some change in one of them, esp. the formation of steel by heating iron in powdered charcoal. [1585–95]

Translations

cementazione

Cementation

cementation

[‚sē‚men′tā·shən] (chemistry) The setting of a plastic material. (engineering) Plugging a cavity or drill hole with cement. Also known as dental work. Consolidation of loose sediments or sand by injection of a chemical agent or binder. (geology) The precipitation of a binding material around minerals or grains in rocks. (metallurgy) High-temperature impregnation of a metal surface with another material. Conversion of wrought iron into steel by packing layers of bars in charcoal sealed with clay and heating to 1000°C for 7-10 days.

Cementation

in construction, the consolidation of soils, rocks, and stone or concrete masonry by injecting a cement solution or suspension into voids, cracks, or pores. The process is used to strengthen the beddings of structures; to provide seepage barriers; and to waterproof rocks in tunnels, mine shafts, and stone and concrete masonry, as well as to reduce the porosity of such masonry.

Cementation

in nonferrous metallurgy, a hydrometallurgical process based on the displacement of the more electropositive metals from solutions of their compounds by less electropositive metals in the solid state. For example, the normal electrode potential of copper is +0.344 volts, and that of zinc is –0.762 volts; the difference between the potentials makes it possible to obtain the reaction Cu²⁺_solution + Zn_metal → Zn²⁺_solution + Cu_metal. The greater the difference in potentials, the lower the content of precipitated metal that will remain in the solution. Cementation is extensively used to remove impurities from solutions and to recover metals from solutions. The process can also be used to precipitate metals from molten slags.

REFERENCES

Plaksin, I. N., and D. M. Iukhtanov. Gidrometallurgiia. Moscow, 1949.
Maslenitskii, I. N., and L. V. Chugaev. Metallurgiia blagorodnykh melallov. Moscow, 1972.
Naboichenko, S. S., and V. I. Smirnov. Gidrometallurgiia medi. Moscow, 1974.

cementation

The setting of a cement.

cementation

ce·men·ta·tion

(sē'men-tā'shŭn), 1. The process of attaching parts by means of a cement. 2. In dentistry, attaching a restoration to natural teeth by means of a cement.

ce·men·ta·tion

(sē'men-tā'shŭn) 1. The process of attaching parts by means of a cement. 2. In dentistry, attaching a restoration to natural teeth by means of a cement.

ce·men·ta·tion

(sē'men-tā'shŭn) 1. In dentistry, attaching a restoration to natural teeth by means of a cement. 2. Process of attaching parts by means of a cement.

单词	cementation
释义	cementation ce·men·ta·tion C0193800 (sē′mĕn-tā′shən)n.1. The act, process, or result of cementing.2. A metallurgical coating process in which iron or steel is immersed in a powder of another metal, such as zinc, chromium, or aluminum, and heated to a temperature below the melting point of either. cementation (ˌsiːmɛnˈteɪʃən) n1. (Metallurgy) the process of heating a solid with a powdered material to modify the properties of the solid, esp the heating of wrought iron, surrounded with charcoal, to 750–900°C to produce steel2. the process of cementing or being cemented3. (Civil Engineering) civil engineering the injection of cement grout into fissured rocks to make them watertight ce•men•ta•tion (ˌsi mənˈteɪ ʃən, -mɛn-, ˌsɛm ən-) n. 1. the act, process, or result of cementing. 2. the heating of two substances in contact in order to effect some change in one of them, esp. the formation of steel by heating iron in powdered charcoal. [1585–95] Translations cementazione Cementation cementation [‚sē‚men′tā·shən] (chemistry) The setting of a plastic material. (engineering) Plugging a cavity or drill hole with cement. Also known as dental work. Consolidation of loose sediments or sand by injection of a chemical agent or binder. (geology) The precipitation of a binding material around minerals or grains in rocks. (metallurgy) High-temperature impregnation of a metal surface with another material. Conversion of wrought iron into steel by packing layers of bars in charcoal sealed with clay and heating to 1000°C for 7-10 days. Cementation in construction, the consolidation of soils, rocks, and stone or concrete masonry by injecting a cement solution or suspension into voids, cracks, or pores. The process is used to strengthen the beddings of structures; to provide seepage barriers; and to waterproof rocks in tunnels, mine shafts, and stone and concrete masonry, as well as to reduce the porosity of such masonry. Cementation in nonferrous metallurgy, a hydrometallurgical process based on the displacement of the more electropositive metals from solutions of their compounds by less electropositive metals in the solid state. For example, the normal electrode potential of copper is +0.344 volts, and that of zinc is –0.762 volts; the difference between the potentials makes it possible to obtain the reaction Cu²⁺_solution + Zn_metal → Zn²⁺_solution + Cu_metal. The greater the difference in potentials, the lower the content of precipitated metal that will remain in the solution. Cementation is extensively used to remove impurities from solutions and to recover metals from solutions. The process can also be used to precipitate metals from molten slags. REFERENCES Plaksin, I. N., and D. M. Iukhtanov. Gidrometallurgiia. Moscow, 1949. Maslenitskii, I. N., and L. V. Chugaev. Metallurgiia blagorodnykh melallov. Moscow, 1972. Naboichenko, S. S., and V. I. Smirnov. Gidrometallurgiia medi. Moscow, 1974. cementation The setting of a cement. cementation ce·men·ta·tion (sē'men-tā'shŭn), 1. The process of attaching parts by means of a cement. 2. In dentistry, attaching a restoration to natural teeth by means of a cement. ce·men·ta·tion (sē'men-tā'shŭn) 1. The process of attaching parts by means of a cement. 2. In dentistry, attaching a restoration to natural teeth by means of a cement. ce·men·ta·tion (sē'men-tā'shŭn) 1. In dentistry, attaching a restoration to natural teeth by means of a cement. 2. Process of attaching parts by means of a cement. AcronymsSeecurium
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