Portland Cement; Its Composition, Raw Materials, Manufacture, Testing and Analysis |
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Common terms and phrases
alkali alumina ammonia analysis apparatus ball mill barrels beaker bins boiling bottle briquettes bulb burner burning CaCO3 calcium carbonate calcium chloride carbon dioxide carbonate of lime cement-rock cent chemical clay clinker coal containing conveyor cool crucible crusher determination diameter dilute driven dryer Engineering evaporate ferric oxide filter filtrate fineness flask gases glass gram Griffin mill grinding ground gypsum heat hot water hydrochloric acid inch iron and alumina latter Lehigh limestone Loss on ignition magnesia manufacture marl method minutes mixture mortar neat particles pass percentage permanganate plant plaster of Paris platinum Portland Cement pounds precipitate pulverized quantity quick-setting raw materials residue rock rotary kiln sample sand screen shale shown in Fig sieve silica slag slurry sodium carbonate solution specific gravity standard steam stopper strength sulphate sulphuric acid TABLE temperature tion tube mill usually wash weigh
Popular passages
Page 405 - Section 37, and quickly formed into a ball with the hands, completing the operation by tossing it six times from one hand to the other, maintained about 6 in.
Page 456 - Constancy of Volume. Pats of neat cement about three inches in diameter, one-half inch thick at the center, and tapering to a thin edge, shall be kept in moist air for a period of twenty-four hours. (a) A pat is then kept in air at normal temperature. (b) Another is kept in water maintained as near 70° F.
Page 429 - ... being covered with felt and this felt kept wet. The bottom of the box is so constructed as to hold water, and the sides are provided with cleats for holding glass shelves on which to place the briquettes. Care should be taken to keep the air in the closet uniformly moist.
Page 255 - The precipitate and filter are placed wet in a platinum crucible, and the paper burned off over a small flame of a Bunsen burner.
Page 430 - Test pieces should be broken as soon as they are removed from the water. Care should be observed in centering the briquettes in the testing machine, as cross-strains, produced by improper 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 briquettes before the ultimate strength is reached.
Page 457 - A third pat is exposed in any convenient way in an atmosphere of steam, above boiling water, in a loosely closed vessel for five hours. 23. These pats, to satisfactorily pass the requirements, shall remain firm and hard, and show no signs of distortion, checking, cracking, or disintegrating.
Page 428 - The sand and cement should be thoroughly mixed dry. The mixing should be done on some non-absorbing surface, preferably plate glass. If the mixing must be done on an absorbing surface, it should be thoroughly dampened prior to use.
Page 407 - Care should be taken to keep the needle clean, as the collection of cement on the sides of the needle retards the penetration, while cement on the point reduces the area and tends to increase the penetration.
Page 254 - ... water. The filtrate is again evaporated to dryness, the residue without further heating, taken up with acid and water and the small amount of silica it contains separated on another filter paper. The papers containing the residue are transferred wet to a weighed platinum crucible, dried, ignited, first over a Bunsen burner until the carbon of the filter is completely consumed, and finally over the blast for...
Page 426 - Ottawa, 111., screened to pass a sieve having 20 meshes per linear inch and retained on a sieve having 30 meshes per linear inch; the wires to have diameters of 0.0165 and 0.0112 inch, respectively, ie, half the width of the opening in each case.