Cement and Engineering News Volume 26

Cement and Engineering News Volume 26

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ...Vancouver islands. The limestones of this formation are uniformly rich in lime and poor in magnesia, and for many years have been productive of the finest lime on the market. Since the rapidly increasing demand for Portland cement these deposits have been eagerly sought under favorable conditions and in accessible localities. At Balfour they form veritable mountains, while at other places they are found in ledges, overflows and pockets. The clay deposits cover an area of 160 acres at Brennan, Washington, seven miles north of the plant, on the Great Northern railroad. The exact volume of clay is not known but has been tested at several points to determine that the supply is abundant. This clay was at one time used in manufacture of brick. The true value of this clay for cement purposes is best shown by the analysis made, as follows: Average Analysis of Clay Components--Per Cent. Silica............................ 58.20 Alumina......................... 18.17 Iron oxide....................... 6.95 Lime............................ 3.47 Magnesia........................ 3.28 Loss by ignition.................. 6.00 ' Balance undetermined. Bellingham. Washington The gypsum used is mined at Gypsum, Chichagof island, Alaska, and delivered to the cement plant by the Pacific Coast Gypsum Company, Tacoma. This is a high grade product containing about 77 per cent calcium sulphate and about 22 per cent water. Water, of course, is used more or less for one purpose or another about every manufacturing plant, but it is here mentioned as one of the principal raw materials because it is an essential element in preparing the raw materials for the kilns. As a wet-process plant the water used in the manufacturing alone amounts to one-half of the weight of the...show more

Product details

  • Paperback | 50 pages
  • 189 x 246 x 3mm | 109g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236934342
  • 9781236934345