Proceedings Volume 14, PT. 2

Proceedings Volume 14, PT. 2

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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: ...items of knowledge which are obtainable mainly in the laboratory, but which are very essential for the correct diagnosis of a concrete failure. The effect of workmanship is by far the largest factor, and in it all others are included, for a poor workman can destroy the value of the best materials. Under the head of workmanship must be considered such items as design, proportions, placing, and actions resulting from heat, frost, electrolysis, etc., which should have been taken care of during the process of making, hardening and preservation. As another element of importance, it must always be kept in mind that the water used in making the concrete, or which may come in contact with it, may prove to be a very influential factor for harmful results. Then, if one is given a concrete failure to diagnose one must look for a reason under cement, aggregate, workmanship and water. As stated, the easiest explanation is to look for some fault in the cement, but if, as has been suggested, the cement had passed the usual tests, then other reasons must be found. To find them requires that the investigator shall first know conditions and causes of failures, but these will not be further discussed except to point out the way to the reason; then the investigator must attack the problem with an open mind--that is, he must not jump at a conclusion and expect to be able to work out an explanation around that conclusion. Then it is even more essential that the investigator shall have had an opportunity to learn of results of tests, or to make tests that will enable him to judge the probable actions from the characteristics of the aggregates. Also, a very careful examination of the concrete in place is generally an absolute necessity. To attempt to outline more

Product details

  • Paperback | 176 pages
  • 189 x 246 x 10mm | 327g
  • United States
  • English
  • black & white illustrations
  • 123687076X
  • 9781236870766