Highway Inspectors Handbook Etc

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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. 1919 edition. Excerpt: ...371). A cubic foot measure for determining weight per cubic foot in case broken slag is used ( 375). A stout screw driver about 6 inches long. A thermometer ( 386). For Records and Reports: A field diary and pencil. A supply of report forms ( 404). A carbon paper for duplication of reports. 209. Maintenance. For maintenance the Inspector's equipment will ordinarily be the same as for surface treatment with carpeting mediums ( 191). If extensive patching is involved, however, he may in addition require certain items covered under construction ( 208). CHAPTER XI INSPECTION OF CONCRETE FOUNDATIONS AND PAVEMENTS GENERAL CHARACTERISTICS 210. Composition. Without descriptive prefix the term "concrete" is generally understood in this country to mean a mixture of Portland cement ( 65) with coarse and fine mineral aggregate and water. Coarse aggregate may consist of broken stone, broken slag, gravel or shell which will be retained on a J-inch screen. Fine aggregate may consist of sand, or screenings from any of the above-mentioned materials which will pass a j-inch screen. While Portland cement is almost invariably used as the bonding element for concrete road' structures, natural cement ( 72) or Puzzolan cement ( 61) may be used to serve a similar purpose. 211. Proportioning. The strength and other resistant qualities of well-mixed and well-cured concrete depend not only upon the quality of the various constituents but upon the relative proportions in which they are present. In specifications these proportions are almost invariably stated upon a volume basis for cement, fine aggregate and coarse aggregate. Thus a 1: 2: 4 concrete is composed of one part by volume of cement, two parts by...

Dated May 2007. This title, and its companion volume 1 "Reference manual" (ISBN 9780115527975), supersede "Bridge inspection guide" (1984, ISBN 9780115506383)

Dated May 2007. This title, and its companion volume 2 "Inspector's handbook" (ISBN 9780115527982), supersede "Bridge inspection guide" (1984, ISBN 9780115506383)

The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.