 | 1905 - 830 Seiten
...the following paragraphs: Natural cement*. — Natural cements are produced by burning a naturally impure limestone, containing from 15 to 40 per cent of silica. alumina, and iron oxide, at a comparatively low temperature, usually about that of ordinary lime burning. The operation can... | |
 | Edwin Clarence Eckel - 1904 - 148 Seiten
...to one part of clayey material. NATURAL CEMENTS. Natural cements are produced by burning a naturally impure limestone, containing from 15 to 40 per cent. of silica, alumina, and iron oxide. This burning takes place at a comparatively low temperature, about that of ordinary lime burning. The... | |
 | 1904 - 1040 Seiten
...result is quite different. Natural cements. — Natural ceuients are produced by burning a naturally impure limestone, containing from 15 to 40 per cent of silica, alumina, and iron oxide, at a comparatively low temperature, about that of ordinary lime burning. The operation can therefore... | |
 | 1904 - 768 Seiten
...result is quite different. Xatural cement*.— Natural cements are produced by burning a naturally impure limestone, containing from 15 to 40 per cent of silica, alumina, and iron oxide, at a comparatively low temperature, about that of ordinary lirne burning. The operation can therefore... | |
 | Samuel Franklin Emmons - 1905 - 648 Seiten
...the following paragraphs: Natural cement x. — Natural cements are produced by burning a naturally impure limestone, containing from 15 to 40 per cent of silica, alumina, and iron oxide, at a comparatively low temperature, usually about that of ordinary lime burning. The operation can... | |
 | Geological Survey (U.S.) - 1905 - 462 Seiten
...result is quite différent. Natural cements. — Natural cements are produced by burning a naturally impure limestone, containing from 15 to 40 per cent of silica, alumina, and iron oxide, at a comparatively low temperature, about that of ordinary lime burning. The operation can therefore... | |
 | Edwin Clarence Eckel - 1905 - 802 Seiten
...the true limes and the cements proper. 2. Natural cements are produced by burning a natural clayey limestone, containing from 15 to 40 per cent of silica, alumina, and iron oxide. This burning takes place at a temperature that is usually little if any above that of an ordinary lime-kiln.... | |
 | Heinrich Ries - 1906 - 690 Seiten
...cements. 3. Puzzolan cements. Natural cements. — Natural cements are produced by burning a naturally impure limestone, containing from 15 to 40 per cent, of silica, alumina, and iron oxide, at a comparatively low temperature, about that of ordinary lime burning. The operation can therefore... | |
 | Mississippi Geological, Economic, and Topographical Survey - 1907 - 512 Seiten
...greatly reduce the temperature of incipient fusion. Natural Cement. Natural cement is produced by burning an impure limestone containing from 15 to 40 per cent of silica, alumina and iron oxide. In addition to these ingredients it usually contains a small per cent of alkalies, sulphur trioxide... | |
 | William Tudor Griswold - 1908 - 602 Seiten
...proportions. Usually this combination is made by mixing limestone or marl with clay or shale, and in such a mixture should contain about three parts of...the product of an impure limestone containing from !."> to 40 per cent of silica, alumina, and iron oxide. Calcareous and argillaceous rocks suitable... | |
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Natural cements are produced by burning a naturally impure limestone, containing from 15 to 40 per cent of silica, alumina, and iron oxide, at a comparatively low temperature, about that of ordinary lime burning. The operation can therefore be carried... 
