The Black Hills Engineer Volume 9-10

The Black Hills Engineer Volume 9-10

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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. 1919 edition. Excerpt: ... traffic. It is an expensive method covering a long period of time and does not assure the successful construction of the experimental road. Tests made upon engineering materials may be divided into two classes--research tests and routine tests. Research tests are made for the purpose of determining how a material may be made and used to best advantage, and investigations are carried on to improve the present product, whatever it may be, and to determine additional knowledge regarding that product, and to establish new methods of testing. Routine tests are those which determine whether a particular material passes the requirements of a specification, or in other words, whether the material is satisfactory to use in construction work. These are usually called acceptance tests. Experimenters obtain a knowledge of materials by watching their behavior under stress. While the usual routine test has for its object the determination of the physical properties of stress and elasicity; in some cases--for example, concrete for use in road construction--testing conditions are made to approximate actual wearing conditions, in order that some indication may be obtained regarding the possible success in the use of a concrete of given proportions, with known cement and aggregates, instead of waiting a long period of time to observe how a road stands up under traffic. This would be the case with a service test or an experimental road. Each test upon a material naturally falls into three parts: First, the test proper, or actual manipulation, which includes the method of procedure and the results; second, the significance of the test, which is the why of the test or the factor the experimenter is trying to bring out; and, third, the interpretation of results, ..
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Product details

  • Paperback | 126 pages
  • 189 x 246 x 7mm | 240g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236570545
  • 9781236570543