Bulletin, Issue 27Geological Survey of Georgia., 1912 - Geology |
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Common terms and phrases
Alabama Alumina Alumina Al2O3 Analyses of Limestone Appalachian Valley argillaceous argillaceous limestone argillaceous materials Bangor Bangor formation Bangor limestone calcareous calcium carbonate Cambrian cent chemical composition chert Chickamauga Chickamauga formation Chickamauga limestone clinker coal Connasauga formation contains Creek crystalline Cumberland Plateau dark-blue limestone Description of Units east exposed FeO3 Ferric oxide Fe2O3 fine-grained Floyd formation following analyses show following analysis Geol gray grayish-blue hydrated hydraulic limes interbedded iron kilns Knox dolomite Lime CaO limestone limestones and shales Lookout Mountain Loss on ignition Magnesia MgO manufacture of Portland Map location Marble Company massive mill Murphy marble natural cement northeast Ordovician outcrops Phosphorus pentoxide Phosphorus pentoxide P2O5 plant Polk County Portland cement Portland Cement Company quarry raw materials Rockmart Rockmart shales Rockwood formation Rome sandstones shales show the chemical Silica SiO2 slag stone stratigraphic Sulphur trioxide SO3 Taylor Ridge Thickness feet feet Thickness Thickness feet thin-bedded
Popular passages
Page 278 - Portland cement is the product obtained by finely pulverizing clinker produced by calcining to incipient fusion an intimate and properly proportioned mixture of argillaceous and calcareous materials, with no additions subsequent to calcination excepting water and calcined or uncalcined gypsum.
Page 278 - The specific gravity of cement shall not be less than 3.10. Should the test of cement as received fall below this requirement, a second test may be made upon a sample ignited at a low red heat. The loss in weight of the ignited cement shall not exceed 4 per cent.
Page 278 - ... disintegrating. If the cement fails to meet the prescribed steaming test, the cement may be rejected or the steaming test repeated after seven or more days, at the option of the engineer.
Page 283 - ... centering, tend to lower the breaking strength. The load should not be applied too suddenly, as it may produce vibration, the shock from which often breaks the briquette before the ultimate strength is reached.
Page 279 - ... be dry and free from lumps. Each package shall be plainly labeled with the name of the brand and of the manufacturer.
Page 278 - Briquettes made of neat cement, after being kept in air for twenty-four hours under a wet cloth and the balance of the time in water, shall develop tensile strength per square inch as follows: After seven days, 450 pounds; after twenty-eight days, 540 pounds.
Page 279 - A cement may be rejected which, fails to meet any of the above requirements. An agent of the contractor may be present at the making of the tests, or, in case of the failure of any of them, they may be repeated in his presence. If the contractor so desires, the engineer officer...
Page 31 - Plasters, p. 169. (3) Natural Cements. — Cements which are made by burning impure limestones at a low temperature (insufficient to vitrify) which do not slake with water, but require to be ground in order to convert them into a hydraulic cement. (4) Portland Cement. — Hydraulic cements which are made by heating to incipient vitrification a mixture of argillaceous and calcareous substances, which product does not slake with water, but upon grinding forms an energetic hydraulic cement. (5) Puzzolan...
Page ii - Governor of Georgia PRESIDENT OF THE BOARD HON. PHILIP COOK Secretary of State HON. WJ SPEER State Treasurer HON. WA WRIGHT Comptroller-General HON.
Page 48 - OPERATION 1. Multiply the percentage of silica in the clayey material by 2.8, the percentage of alumina by 1.1, and the percentage of iron oxide by 0.7; add the products; subtract from the sum thus obtained the percentage of lime oxide in the clayey material plus 1.4 times the percentage of magnesia and call the result n.