 | 1901 - 552 Seiten
...invariably very low in magnesia. Portland cement was discovered by Joseph Apsdin, of Leeds (Eng.), who desired to make an artificial cement that would...because it hardened under water to a mass resembling Portland stone. With very few exceptions, Portland cements arc artificial mixtures, and many of the... | |
 | Heinrich Ries - 1901 - 562 Seiten
...invariably very low in magnesia. Portland cement was discovered by Joseph Apsdin, of Leeds (Eng.), who desired to make an artificial cement that would...because it hardened under water to a mass resembling Portland stone. With very few exceptions, Portland cements are artificial mixtures, and many of the... | |
 | Heinrich Ries - 1905 - 522 Seiten
...applied to artificial mixtures of clay and .lime rock, which are burned to a temperature of clinkering. Portland cement was first made by Joseph Apsdin, of...mass resembling the Portland stone of England. The three essentials for Portland cement are lime, silica, and alumina, and it is consequently necessary... | |
 | Heinrich Ries - 1916 - 1358 Seiten
...3645 The following are some analyses of the burned material: — ANALYSES OF SOME NATURAL ROCK CEMENTS Portland Cement (2). — Portland cement is the product...manufacture of true Portland cement in the United States: bog lime and clay; limestone and day, or shale; chalk and clay; pure limestone and argillaceous limestone.... | |
 | 1901 - 548 Seiten
...invariably very low in magnesia. Portland cement was discovered by Joseph Apsclin, of Leeds (Eng.), who desired to make an artificial cement that would...because it hardened under water to a mass resembling Portland stone. With very few exceptions, Portland cements are artificial mixtures, and many of the... | |
| |
Portland cement is the product obtained by burning a finely ground artificial mixture consisting essentially of lime, silica, alumina, and some iron oxide, these substances being present in certain definite proportions. Portland cement was first made... 