Portland Cement: Its Composition, Raw Materials, Manufacture, Testing and AnalysisChemical publishing Company, 1906 - 385 sayfa |
Diğer baskılar - Tümünü görüntüle
Sık kullanılan terimler ve kelime öbekleri
alkali alumina ammonia ammonium analysis apparatus ball mill barrel beaker bins blast boiling bottle brick briquettes bulb burner burning CaCO CaCO3 calcium carbonate calcium chloride carbon dioxide carbonate of lime cement rock cent chemical clinker coal containing cool crucible crusher cylinder determination diameter dilute dish dissolve dried dryer Engineering evaporate ferric oxide filter filtrate flask gases glass gram Griffin mill grinding gypsum heat hot water hydrochloric acid ignite inches iron and alumina latter limestone magnesia manufacture marl method minutes mixture molds mortar neat oxalate pass percentage permanganate plant plaster of Paris plate platinum Portland cement potash pounds precipitate quantity quarry raw material residue rotary kiln sample sand shale sieve silica slurry sodium sodium carbonate solution specific gravity standard stopper strength sulphate sulphuric acid temperature tion titrate tube mill usually wash weigh ΙΟ Ο.ΟΙ
Popüler pasajlar
Sayfa 349 - 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.
Sayfa 277 - A convenient method for cleaning the apparatus is as follows : The flask is inverted over a large vessel, preferably a glass jar, and shaken vertically until the liquid starts to flow freely; it is then held still in a vertical position until empty; the remaining traces of cement can be removed in a similar manner by pouring into the flask a small quantity of clean liquid and repeating the operation. 18. — More accurate determinations may be made with the picnometer.
Sayfa 316 - 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. 56.
Sayfa 319 - 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 briquette before the ultimate strength is reached. Care must be taken that the clips and the sides of the briquette be clean and free from grains of sand...
Sayfa 299 - 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.
Sayfa 277 - The whole quantity of the powder is introduced, and the level of the liquid rises to some division of the graduated neck. This reading plus 20 cu. cm. is the volume displaced by 64 gr. of the powder. 15. — The specific gravity is then obtained from the formula: Weight of cement Specific gravity = Displaced volume 16. — The flask, during the operation...
Sayfa 168 - ... minutes, or longer if the blast is not powerful enough to effect complete conversion to a cement in this time. It is then transferred to an evaporating dish, preferably of platinum for the sake of celerity in evaporation...
Sayfa 297 - Cement. desired position by a screw F, carries an indicator, which moves over a scale (graduated to centimeters) attached to the frame K. The paste is held by a conical, hard-rubber ring I, 7 cm.
Sayfa 89 - The roll is revolved within the die in the same direction that the shaft is driven, but when coming in contact with the die it travels around the die in the opposite direction from that in which the roll is revolving with the shaft, thus giving the mill two direct actions on the material to be ground.