 | Heinrich Ries - Clay - 1906 - 690 pages
...usually yellow to brown in color and light in weight, having a specific gravity of 2.7 to 3.1, while Portland cement is commonly blue to gray in color and heavier, its specific gravity ranging from 3 to 3.2. (4) Natural cements set more rapidly than Portland cement, but do not attain so high tensile... | |
 | Geology - 1907 - 656 pages
...yellow to brown in color and light in weight, their specific gravity being about 2.7 to 2.9; while Portland cement is commonly blue to gray in color...kiln never being heated high enough to even approach the fusing or clinkering point. (4) In use, natural cements set more rapidly than Portland cement,... | |
 | Iowa Geological Survey - Geology - 1907 - 672 pages
...yellow to brown in color and light in weight, their specific gravity being about 2.7 to 2.9; while Portland cement is commonly blue to gray in color...heavier, its specific gravity ranging from 3.0 to 3.2. 36 MATERIALS AND MANUFACTURE OF PORTLAND CEMEXT. (3) Natural cements are always burned at a lower temperature... | |
 | Maryland Geological Survey - 1909 - 586 pages
...yellow to brown in color and light in weight, their specific gravity being about 2.7 to 3.10, while Portland cement is commonly blue to gray in color...heavier, its specific gravity ranging from 3.0 to 3.2. clayey materials are first attacked by tht the decarbonation of the limestone at ; 650° C. At 1000°... | |
 | Maryland Geological Survey - Geology - 1909 - 546 pages
...yellow to brown in color and light in weight, their specific gravity being about 2.7 to 3.10, while Portland cement is commonly blue to gray in color...heavier, its specific gravity ranging from 3.0 to 3.2. * Eckel, EC Cements, Limes, and Plasters, p. 195. 3. Natural cements are always burned at a lower temperature... | |
 | Maryland Geological Survey - Geology - 1909 - 542 pages
...yellow to brown in color and light in weight, their specific gravity being about 2.7 to 3.10, while Portland cement is commonly blue to gray in color...heavier, its specific gravity ranging from 3.0 to 3.2. * Eckel, EC Cements, Limes, and Plasters, p. 195. 3. Natural cements are always burned at a lower temperature... | |
 | Geology - 1909 - 568 pages
...usually yellow to brown in color and light in weight, having a specific gravity of 2.7 to 3.1, while Portland cement is commonly blue to gray in color and heavier, its specific gravity ranging from 3 to 3.2. (4) Natural cements set more rapidly than Portland cement, but do not attain so high tensile... | |
 | Sanders Publishing Co. (Chicago) - Farm buildings - 1909 - 360 pages
...usually yellow to brown in color and light in weight, having a specific gravity of 2.7 " to 3.1, while Portland cement is commonly blue to gray in color and heavier, its specific gravity ranging from 3 to 3.2. 4. Natural cements set more rapidly than Portland cement, but do not attain so high tensile... | |
 | Edward Bennett Mathews, John Sharshall Grasty - Cement industries - 1910 - 314 pages
...yellow to brown in color and light in weight, their specific gravity being about 2.7 to 3.10, while Portland cement is commonly blue to gray in color...heavier, its specific gravity ranging from 3.0 to 3.2. * Eckel, EC Cements, Limes, and Plasters, p. 195. 3. Natural cements are always burned at a lower temperature... | |
 | 1911 - 360 pages
...usually yellow to brown in color and light in weight, having a specific gravity of 2.7 to 3.1, while Portland cement is commonly blue to gray in color and heavier, its specific gravity ranging from 3 to 3.2. 4. Natural cements set more rapidly than Portland cement, but do not attain so high tensile... | |
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... (2) Natural cements, after burning and grinding, are usually yellow to brown in color and light in weight, their specific gravity being about... 
