Bulletin, Ausgaben 1-3The Survey, 1907 - 71 Seiten |
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alumina Alumina Al2O3 Aluminum oxide Al2O3 amount ANALYSES OF SELMA bluff bottom brick clay brown loam Calcium oxide Calcium oxide CaO cent of water chemical CLAY INDUSTRY clay pit Clay substance CO₂ color composition contains County deposits dryer drying feet thick formation Free silica fuel Geological Hilgard Holly Springs Impurities Iron oxide Fe2O3 Jackson K₂O kaolin kaolinite Lafayette layers lignite limestone loam Loess machine Magnesia Magnesium oxide Magnesium oxide MgO manufacture of brick marl material minerals Mississippi Mississippi lignites Moisture H2O molded Oktibbeha County outcrop particles Porter's Creek Portland cement pounds per square pyrites RATIONAL ANALYSIS reports residual clay River rock sample sand sandy Selma Selma chalk Selma limestone shale silica Silica SiO2 Silicon dioxide SiO2 soft-mud square inch stiff-mud stratum streams Sulphur trioxide Sulphur trioxide SO3 TABLE temperature tensile strength tile Tishomingo County total shrinkage up-draft kilns Vicksburg Vicksburg limestone Volatile matter CO2 Wilcox Yazoo
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Seite 33 - ... derived from: A. Granitic or gneissoid rocks. B. Basic igneous rocks. . C. Limestone or dolomite. D. Slate or shale. E. Sandstone. II. Transported by: A. Gravity assisted by water. Deposits near the heads and along the slopes of ravines. B. Ice. Deposits resulting mainly from the melting of the ice of the Glacial epoch. C. Water. 1. Marine. 2. Lacustrine. 3. Stream. D. Wind. Loess.
Seite 10 - ... the water is entirely evaporated. Then I break the said mixture into suitable lumps, and calcine them in a furnace similar to a lime kiln till the carbonic acid is entirely expelled. The mixture so calcined is to be ground, beat, or rolled to a fine powder, and is then in a fit state for making cement or artificial stone.
Seite 34 - Portland cement clinker is much harder to grind than any possible combination of raw materials ; but it must be remembered that for every barrel of cement produced about 600 pounds of raw materials must be pulverized, while only a scant 400 pounds of clinker will be treated, and that the large crushers required for some raw materials can be dispensed with in crushing clinker. With this exception, the raw material side and the- clinker side of a dry-process Portland cement plant are usually almost...
Seite 115 - The hydrogen unites with oxygen in the proportion of two parts of hydrogen to one part of oxygen, forming water (HO).
Seite 41 - ... 5. Excess of silica. A large excess of silica indicates a sandy clay. If present in the analysis of a fire clay, it indicates low refractoriness. "6. The quantity of organic matter. If this is determined separately, and it is present to the extent of several per cent., it would require slow burning if the clay was dense. "7. The presence of several per cent. of both lime (Ca O) and carbon dioxide (CO2) in the clay indicates that it is quite calcareous.
Seite 68 - BONDING POWER. The bonding power of a clay is its power to hold together particles of non-plastic materials. The bonding power of a clay is dependent in a measure on the amount of clay substance which the clay contains. It also depends on the size of the grain of the inert matter added.
Seite 68 - Description. Fine gravel. Coarse sand. Medium sand. Fine sand. Very fine sand. Silt. Clay.
Seite 17 - PORTLAND CEMENT is the product obtained by finely pulverizing clinker produced by burning to semi-fusion an intimate artificial mixture of finely ground calcareous and argillaceous materials, this mixture consisting approximately of three parts lime carbonate (or an equivalent amount of lime) to one part silica, alumina and iron oxide.
Seite 41 - ... 3. The color to which the clay burns. This may be judged approximately, for clays with several per cent. or more of ferric oxide will burn red, provided...
Seite 68 - POROSITY. A porous clay is one which contains considerable space not occupied by clay particles. This unoccupied space is called pore space and its volume depends on the size and shape of the clay particles. The maximum volume of pore space would be reached in a clay containing spherical grains of equal size.