Illinois State Geological Survey Bulletin Volume 9

Illinois State Geological Survey Bulletin Volume 9

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ...dryers. In fact the maximum amount of water which Grout admits could be so molecularly attracted, agrees quite closely with the water which in Table XI is shown to be in excess of that required to fill the pores. While Grout's statement of the facts in this case has been proved incorrect, further investigation may find a relation between the molecularly attracted water and "excess water." As yet, however, such a relation cannot be established. That a clay particle does possess a molecular attraction peculiar to itself is not denied. That this molecular attraction alone is sufficient to cause a plasticity that is peculiar and belongs to no other substance must be discredited until evidence is brought forward that will bear an analysis such as is given in Table XIV. It would be most difficult for supporters of the molecular attraction theory to prove that the kaolin grains in primary clays do not possess every physical property that is attributed to the grains of the clay substance in the secondary clays, save that of plasticity. Chemically alike, and differing physically only in this one respect, yet to the one, according to this theory, must be accredited no, or very little, molecular attraction for water, and to the other a strong molecular attraction. Grout1 may be quoted as follows: "The attraction of two grains may vary with the nature of the grains. The greater the attraction the farther they can be separated without losing coherence.. Another way in which the films become viscous is the result of molecular attraction, which binds a film oyer the surface of the grain and renders it viscous. The friction between this film and the solid grain of clay is said to be infinite, compared with water outside of the film. But when...show more

Product details

  • Paperback | 110 pages
  • 189 x 246 x 6mm | 213g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236503147
  • 9781236503145