Minutes of Proceedings of the Institution of Civil Engineers Volume 60, PT. 2

Minutes of Proceedings of the Institution of Civil Engineers Volume 60, 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. 1880 edition. Excerpt: ...Director of Public Works of Paris, M. Vaissiere, Chief Engineer, M. Allard, Chief Engineer, M. Barabant, Engineer, M. Vauthier, Municipal Councillor, Paris, Messrs. Durand-Claye and Herve Mangon of the fcole des Ponts et Chaussees, M. Mascart of the Bureau Central Meteorologique, and to M. Dumas and M. Deval, Conductors of the Ponts et Chaussees. The Paper is accompanied by a series of diagrams, from which the woodcuts have been engraved, by several specifications, and by a schedule of prices relating to the maintenance of the footpaths and pavements in Paris, which are preserved for reference. appendix. APPENDIX A. L Extract From The Registry Of Assays. (Ecole des Pouts et Chaussees Laboratory.) Analyses of asphalts submitted by Mr. Delano, manager of the Compagnie Ge'ne'rale des Asphaltes, 117 Quai Valmy, Paris. Sample No. 1 is an almost pure limestone impregnated with bitumen. It is asphalt in the proper sense of the word. Sample No. 2 is also composed of asphalt. It does not contain any appreciable quantity of clay as was presumed; but there is found therein 9 per cent, of pyrites or bisulphuret of iron. Pyrites may become the cause of failure in the use of this material, by the heating to which the material is subjected in its preparation, one half of the sulphur may become transformed into protosulphuret of iron, an oxidisable matter which by exposure to the atmosphere becomes a soluble salt, viz., sulphate of iron. Thus disaggregation may result shortly after the laying down. Sample No. 3 is not properly speaking an asphalt. It is a silicious rock somewhat argillaceous and impregnated with bitumen. It does not contain any pyrites, and would therefore be free from the accident mentioned above. Sample No. 4 is an asphalt almost...show more

Product details

  • Paperback | 212 pages
  • 189 x 246 x 11mm | 386g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123695856X
  • 9781236958563