chemical cement

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• Cement kiln — Cement kilns are used for the pyroprocessing stage of manufacture of Portland and other types of hydraulic cement, in which calcium carbonate reacts with silica bearing minerals to form a mixture of calcium silicates. Over a billion tonnes of… …   Wikipedia

• Cement chemist notation — (CCN) was developed to simplify the formulas which cement chemists use on a daily basis. It is a sort of short hand way of writing the chemical formula of oxides of calcium, silicon, and various metals. Below is a list of all of the abbreviations …   Wikipedia

• cement — cementable, adj. cementer, n. cementless, adj. /si ment /, n. 1. any of various calcined mixtures of clay and limestone, usually mixed with water and sand, gravel, etc., to form concrete, that are used as a building material. 2. any of various… …   Universalium

• Cement — In the most general sense of the word, a cement is a binder, a substance which sets and hardens independently, and can bind other materials together. The name cement goes back to the Romans who used the term opus caementicium to describe masonry… …   Wikipedia

• Cement mill — A 10 MW cement mill, output 270 tonnes per hour A cement mill (or finish mill in North American usage[1]) is the equipment used to grind the hard, nodular clinker from the cement kiln into the fine grey powder that is cement. Most cement is… …   Wikipedia

• Chemical industry — Oil refinery in Louisiana an example of chemical industry The chemical industry comprises the companies that produce industrial chemicals. Central to the modern world economy, it converts raw materials (oil, natural gas, air, water, metals, and… …   Wikipedia

• chemical reaction — Any chemical process in which substances are changed into different ones, with different properties, as distinct from changing position or form (phase). Chemical reactions involve the rupture or rearrangement of the bonds holding atoms together… …   Universalium

• Chemical vapor deposition — DC plasma (violet) enhances the growth of carbon nanotubes in this laboratory scale PECVD apparatus. Chemical vapor deposition (CVD) is a chemical process used to produce high purity, high performance solid materials. The process is often used in …   Wikipedia

• Chemical garden — Comparison of chemical gardens grown by NASA scientists on the International Space Station (left) and on the ground (right) A chemical garden is an experiment in chemistry normally done by adding solid metal salts such as copper sulfate or… …   Wikipedia

• CHEMICAL CRAFTS AND INDUSTRIES — During the Middle Ages a number of crafts involving the use of chemical processes and a certain chemical knowledge were practiced by Jews. Jews sometimes dabbled in alchemy , which frequently led to results of importance to chemistry; the… …   Encyclopedia of Judaism

• History of chemical engineering — Chemical engineering as a discipline is a little over one hundred years old. [W. F. Furter (1982) A Century of Chemical Engineering Plenum Press (New York)] It grew out of mechanical engineering in the last part of the 19th century, because of a… …   Wikipedia