Special Bulletin Volume 59-92

Special Bulletin Volume 59-92

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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. 1913 edition. Excerpt: ...siliceous sand, graded in size from the finer particles to those which will just pass a 14-inch mesh screen, for all tile ten inches and less in diameter. (3) Proper and accurate proportioning of the cement and sand. The method of measuring materials should be one which will insure separate and uniform proportions of each of the materials at all times. (4) Thorough mixing of materials, preferably by a power-operated bat/ch mixer, and continuing for at least one minute after all materials, including water, are in the mixer. (5) Using a machine that accomplishes thorough packing of materials at proper consistency. (6) All other conditions of manufacture having been as outlined, hardening in a properly equipped and operated steam room will produce tile of the highest grade. When, however, hardening by water vapor is not possible, tile must be kept constantly wet on the surface by sprinkling with water for not less than seven days under favorable weather conditions, and longer during cold weather. Cement: If the cement to be used in tile manufacture meets the requirements of the American Society for Testing Materials, the user need concern himself little as regards this, material, other than to make certain that if stored for a considerable time, it is protected from dampness. If not so protected, moisture will be absorbed and result in some of the material becoming hard. In this condition it is worthless for tile manufacture. Aggregate: Aggregate, consisting of sand, crushed stone or gravel screenings, preferably of siliceous nature, should be clean, well graded from fine to coarse and should pass, when dry, a screen having four square meshes per linear inch for all sizes up to ten inches; in sizes larger than ten inches it will be found..
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Product details

  • Paperback | 196 pages
  • 189 x 246 x 11mm | 358g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236806891
  • 9781236806895