Clay Record; A Journal Devoted to the Dissemination of All Matters Pertaining to the Clay Industry Volume 12-13

Clay Record; A Journal Devoted to the Dissemination of All Matters Pertaining to the Clay Industry Volume 12-13

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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. 1898 edition. Excerpt: ...the rammer and the brick. Where rolling is adopted there is as much variation in the weight used as with rammers, one town giving 1 ton as the weight, and another 17% tons, but the generally accepted weight is from 5 to 7 tons, although there are several rollers of 10 tons and upwards. Vhere steam rollers are not used the rollers are drawn by men, probably to prevent displacement of the brick by horses' feet before filling and grouting. All defective or displaced brick are made good before the grouting is done. FILLING on GROUTING. There appears to be the same divergence of opinion amongst American engineers as with us as to the best kind of filling or grouting material, and opinions seem to be about equally divided between cement, pitch and sand. The sand used for the purpose where this material is adopted for filling is clean, sharp river sand. The pitch grouting varies in composition considerably, all aiming at a semi-elastic water-tight joint, sufliciently soft in winter as not to crack, and hard enough to prevent spewing in hot weather. In one case the grout is composed of 90 per cent of coal tar d_istilled at 600 degrees, with 10 per cent of refined Trinidad asphalt. The cement grout is sometimes of neat cement, but more commonly mixed with sand i11 the proportions of from 1 to 1 and 1 to 1%. Some engineers use what is called, " Murphy grout filler." Where pitch or cement grouting is used, it is applied by means of a filler, which is an iron funnel-shaped implement having only a small hole at the bottom with a plug valve attached to a lifting rod, and great care is taken that the grouting does not run over the surface of the pavement but simply fills the joints. I CURVATURE. 27 per cent for periods between more

Product details

  • Paperback | 42 pages
  • 189 x 246 x 2mm | 95g
  • United States
  • English
  • black & white illustrations
  • 1236931335
  • 9781236931337