Bulletin Volume 45-48

Bulletin Volume 45-48

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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. 1913 edition. Excerpt: ...automobile and horse-drawn traffic. Concrete pavements were laid first in 1869 in Grenoble, France, where many streets are still paved with this material. In this country the first use of the concrete pavement was probably in Bellefontaine, Ohio, where several sections were laid in 1893 and 1894. The largest use of concrete in building improved country roads at present is to be found in Wayne County, Mich. These roads are built of a 1:: 3 mixture throughout, with a minimum thickness of 7 inches. The width of the surfaced roadway varies from 9 to 24 feet. The county road officials are very well pleased with this form of construction, and many miles of new concrete roads are being built. In other cases a leaner concrete is used, and the surface is protected from the immediate impact of traffic by a cushion coat formed of some bituminous binder and sand, fine gravel, or screenings. This surface coating is renewed as often as may be necessary. Attempts have also been made to produce a more resilient road surface by mixing a mineral oil with the cement. This form of construction is still in an experimental state. Plate XVI, figure 1, illustrates three types of concrete road, divided as follows: Sections A, B, and C in the first type; sections D and E in the second type; and section F in the third. Section A represents the subgrade; section B, the oiled concrete, 6 inches thick, mixed in the proportion 1:1: 3 and containing 5 pints of oil to each sack of cement (a traveled surface is here shown); and section C, a 2-inch loam covering, used to reduce evaporation while the concrete is curing. Section D represents the plain concrete, 6 inches thick, mixed in the proportion 1:1:3 (the illustration shows a floated surface); and section E represents..show more

Product details

  • Paperback | 52 pages
  • 189 x 246 x 3mm | 109g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236747984
  • 9781236747983