Manual of Recommended Practice for Railway Engineering and Maintenance of Way

Manual of Recommended Practice for Railway Engineering and Maintenance of Way

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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. 1907 edition. Excerpt: ...must be taken that the clips and the sides of the briquette be clean and free from grains of sand or dirt which would prevent a good bearing. The load should be applied at the rate of 600 lbs. per minute. The average of the briquettes of each sample tested should be taken as the test, excluding any results which are manifestly faulty. CONSTANCY OF VOLUME. Method. 48-Tests for constancy of volume are divided into two classes: (1) Normal tests, or those made in either air or water maintained at about 2i C. (700 F.), and (2) accelerated tests, or those made in air, steam or water at a temperature of 45 C. (115 F.) and upward. The test pieces should be allowed to remain 24 hours in moist air before immersion in water or steam, or preservation in air. 49. For these tests, pats about 72 cm. (2.95 in.) in diameter, 1% cm. (0.49 in.) thick at the center, and tapering to a thin edge, should be made, upon a clean glass plate about 10 cm. (3.94 in.) square, from cement paste of normal consistency. 50. A pat is immersed in water maintained as near 210 C. (700 F.) TMnal as possible for 28 days, and observed at intervals. A similar pat is maintained in air at ordinary temperature and observed at intervals. 51. A pat is exposed in any convenient way in an atmosphere of Accelerated steam, above boiling water, in a loosely closed vessel. 52. To pass these tests satisfactorily, the pats should remain firm and hard, and show no signs of cracking, distortion or disintegration. 53. Should the pat leave the plate, distortion may be detected best with a straight-edge applied to the surface which was in contact with the plate. SPECIFICATIONS FOR STONE MASONRY. RECOMMENDED STANDARD SPECIFICATIONS. SPECIFICATIONS FOR STONE MASONRY. GENERAL. 1. The classification more

Product details

  • Paperback | 68 pages
  • 189 x 246 x 4mm | 141g
  • Miami Fl, United States
  • English
  • Illustrations, black and white
  • 123664736X
  • 9781236647368