The Clay Deposits of the Virginia Coastal Plain, Band 2Board of agriculture and immigration, 1906 - 184 Seiten |
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The Clay Deposits of the Virginia Coastal Plain (Classic Reprint) Heinrich Ries Keine Leseprobe verfügbar - 2015 |
The Clay Deposits of the Virginia Coastal Plain (Classic Reprint) Heinrich Ries Keine Leseprobe verfügbar - 2018 |
Häufige Begriffe und Wortgruppen
Absorption abundant Alumina Alumina Al2O3 analyses Appalachian Appalachian Valley argillaceous argillaceous limestone beds Beekmantown blue limestone Blue Ridge BRICKLETS buff burning calcareous shales Calcium carbonate CaCO3 Cambrian cement manufacture cement materials cement rock cent central western Virginia Chambersburg formation chert clay clayey Coastal Plain color cone contain deposits division dolomite drying fault feet fine-grained Fire shrinkage fossils gray Harrisonburg Insoluble Iron oxide J. H. Gibboney kiln Knox dolomite layers Liberty Hall Lime CaO limestone limestones and shales Lower Cambrian Magnesia Magnesia MgO magnesian limestone Magnesium carbonate Magnesium carbonate MgCO3 Martinsburg shale Massanutten mountain massive miles mixture mold Natural Bridge limestone natural cement northwestern Virginia Ordovician Ordovician limestones outcrop portion Portland cement pure limestone railroad sand sandstone Shenandoah silica Silica SiO2 slag Stones River Stones River formation Strasburg strata stratigraphy Structure section surface syncline temperature thickness thin-bedded Trenton upper Valley vicinity yard
Beliebte Passagen
Seite 253 - The material used in the manufacture of natural cement is invariably a clayey limestone, carrying from 13 to 35 per cent. of clayey material, of which 10 to 22 per cent, or so is silica, while alumina and iron oxide together may vary from 4 to 16 per cent.
Seite 1 - Drying the raw materials. — With the exception of the marls and clays used in the wet method of manufacture, Portland cement materials are usually dried before the grinding is commenced. This is necessary because the raw materials, as they come from the quarry, pit or mine, will almost invariably carry appreciable, though often very small, percentages of water, which greatly reduces the efficiency of most modern types of grinding mills, and tends to clog the discharge screens.
Seite 82 - Food adulterant; paint fillers; paper filling; electric insulators; pumps; fulling cloth; scouring soap; packing for horses' feet; chemical apparatus; condensing worms; ink bottles : ultramarine manufacture ; emery wheels ; playing marbles ; battery cups; pins, stilts and spurs for potters' use; shuttle eyes and thread guides; smoking pipes; umbrella stands; pedestals; filter tubes ; caster wheels ; pump wheels ; electrical porcelain ; foot rules; plaster; alum.
Seite 52 - ... and lime (CaO), with the percentage of each given separately. The sum of these two percentages would, however, be equal to the amount of lime carbonate present. While the ultimate analysis, therefore, fails to indicate definitely what compounds are present in the clay, still there are many facts to be gained from it. The ultimate analysis of a clay might be expressed as follows : Silica...
Seite 7 - Natural cements, after burning and grinding, are usually yellow to brown in color and light in weight...
Seite 2 - Griffin mill, etc., and finally reduced in a tube mill. At a few plants, however, single-stage reduction is practiced in Griffin or Huntington mills, while at the Edison plant at Stewartsville, NJ, the reduction is accomplished in a series of rolls. The majority of plants use either the Griffin mill and tube mill or the ball and tube mills, and there is probably little difference in the cost of operating these two combinations. The ball mill has never been quite so successful as its companion, the...
Seite 28 - When such a mass of rock is exposed to the weather, minute cracks are formed in it, due to the rock expanding when heated by the sun and contracting when cooled at night, or they may be joint planes formed by the contraction of the rock as it cooled from a molten condition.