Transactions of the Liverpool Engineering Society Volume 24

Transactions of the Liverpool Engineering Society Volume 24

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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. 1903 edition. Excerpt: ...otherwise in the case of the iron bolts a big break is pretty certain to follow. The chilled steel rolls, which were principally used for making sand, were disappointing, the output from them being quite inadequate. However, they have very few working parts to keep in order, their first cost is small compared with jaw crushers, and these considerations may have led to their continued use throughout the works. The sand had to be fine enough to pass through a th-inch sieve, and in arriving at this result the following proportions were obtained: --Particles between th and-th of an inch in the clear 53.8 per cent. n n pth n sth " "10'9 i i ii ii YVth 5Vth " "I0'74 i i n n-gth ii Tv1 " ii 4.20 Ii n less than yth of an inch in the clear 19'16 n The stone used for all building purposes and for the production of broken stone and sand had a specific gravity of 2.70, or a weight of 168'26 pounds per cubic foot. The weight of a cubic foot of sand lightly filled into a box was 10T2 pounds, but when shaken and rammed it weighed 125 pounds. The broken stone (or macadam), not exceeding 2 inches in any dimension lightly filled, weighed 85.2 pounds per cubic foot, the same well shaken, weighed 97'8 pounds per cubic foot. A cubic foot of lime hydrate weighed 91 pounds. ii ii mortar, 2i to 1, weighed 133-83 pounds, ii "concrete, n 147 pounds. The mortar and concrete were gauged without excess of water and delivered on stages at the different parts of the trench or dam. The concrete was spread on the surface prepared for it in layers of about 3 inches and beaten or rammed with suitable iron tools until it assumed a jelly-like condition at the surface. Flat beaters of wrought iron about 11 inches square, and iron...
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Product details

  • Paperback | 84 pages
  • 189 x 246 x 4mm | 168g
  • United States
  • English
  • black & white illustrations
  • 1236768019
  • 9781236768018