Transactions Volume 16

Transactions Volume 16

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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. 1879 edition. Excerpt: ...delivering it. An experienced concrete builder could tell immediately, by handling, whether cement was in a proper state of age and temperature to be perfectly safe and free from risk of cracking or expansion. Cracks in concrete walls and other concrete work were due either to the cement being of inferior quality, or the aggregates employed in the mixing containing objectionable matter, or, as already explained, on account of the cement not being properly ventilated or aired in storehouses. If these simple objections were avoided, cracks ought not to and would not appear. It might very possibly happen that shrinkage in the ground on which the work was erected would cause a crack in the building; but brick or stone work was liable to the same. More than one case had come before him, where he knew that cracks in concrete work were attributable entirely to the fact of the cement used being slightly, too fresh, which fault, by a little care, could easily have been avoided. TTia firm had had the pleasure of supplying cement to several gas engineers throughout the kingdom, and he was pretty certain that they would endorse his words when he said that their specifications contained such clauses, as to the quality of the cement required, that a manufacturer with any regard at all for his reputation would not send out any Portland cement that would not give entire satisfaction. Mr. A. Macpherson (Kirkcaldy) having had some experience with concrete, could bear out the remarks just made, that if the cement were good and thoroughly aged, there would not be the slightest fear of shrinkage; in fact, there was nothing in the composition which could give any shrinkage, so that there must be some defect in the cement if it occurred. He had constructed...
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Product details

  • Paperback | 112 pages
  • 189 x 246 x 6mm | 213g
  • United States
  • English
  • black & white illustrations
  • 1236945999
  • 9781236945990