Bulletin Volume 8-11; No. 17

Bulletin Volume 8-11; No. 17

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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. 1920 edition. Excerpt: ...material" is used. The edges of the holes should be as nearly vertical as possible, or better, have the bottom of the hole larger than the top. If the hole is of considerable depth, the lower portion should be filled with crushed stone from 1 to 2" in size, well tamped into place and covered with a light application of bitumen. The hole is then filled with the "patching material' and well tamped in. If necessary, after two to four days the patch should receive a light seal coat of bitumen and a covering of torpedo sand or fine stone chips, again tamped and then opened to traffic. With Heavy Oil or Tar. Where the patrolman has not been provided with specially prepared bitumen for patching holes, very satisfactory work may be done by using a heavy asphaltic oil or refined tar, heating it just enough to insure its pouring freely. The holes are cleaned out thoroughly first, the surface of the hole then saturated with bitumen and filled with stone using as large stone as the depth of the hole will permit. The stone must be well compacted in the hole and just enough bitumen applied to cover the outer surface of all the stone placed. Cover the stone with chips from y to in size and tamp thoroughly with a hand tamper. In all cases care must be taken to insure the finished patch being just flush with the adjoining surface. A straight edge is found to be very useful in determining the actual depth of new material necessary. The patrolman in charge of a surface treated section must keep everlastingly after the holes that appear on the surface and keep the shoulders flush with the outer edge of the surface. If the above methods are followed, a stone macadam road can be maintained in excellent condition for travel almost indefinitely, but...show more

Product details

  • Paperback | 184 pages
  • 189 x 246 x 10mm | 340g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236490096
  • 9781236490094