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Alkalies alumina American amount Analyses average ball mill barrel of cement beds briquettes burning calcined calcium carbon dioxide carried cement rock cement-plant Cementation Index cementing materials chapter chemical clay clayey clinker coal composition compressive strength contain cost County crushed crusher cubic cylinder diameter drier Engineering feet fineness Geological Survey granulated grinding gypsum hardening heat hydrate hydraulic limes impurities Iron oxide Kansas kominuter Lehigh district Lime CaO lime carbonate lime-sand brick limestone Magnesia MgO magnesium carbonate manufacture marl methods Mineral mixed mixture mortar natural cements percentage plaster of Paris Portland cement Portland-cement Pounds practice present proportions pulverized quarry raw materials rotary kiln sample sand shale sieve Silica SiO slag cement specific gravity square inch stone sulphate Sulphur trioxide Table temperature tensile strength tests tons tt tt tube mills U. S. Geol usually weight
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Seite 605 - 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.
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Seite 607 - In making the determination, the same quantity of cement as will be subsequently used for each batch in making the briquettes (but not less than 500 grams...