BENEFICIAL USE OF FOUNDRY BY-PRODUCTS IN HIGHWAY CONSTRUCTION

U.S. industries annually generate millions of metric tons of solid by-products, and most of these materials have been landfilled at considerable cost since the inception of modern environmental regulations in the late 1970s and early 1980s. Recently there has been a shift in societal attitudes resulting in strong interest in developing beneficial re-use markets for industrial by-products. As a result, environmental regulations have changed and beneficial re-use of industrial by-products is now permissible in a variety of applications. Blast furnace slag, fly ash, bottom ash, boiler slag, reclaimed pavement materials, coat waste, and many other industrial by-products have been or are in the process of being beneficially used as construction materials. The transportation, construction and environmental industries have the greatest potential for re-use because they use vast quantities of earthen materials annually. Replacement of natural soils, aggregates, and cements with solid industrial by-products is highly desirable. In some cases, a by-product is inferior to traditional earthen materials, but its lower cost makes it an attractive alternative if adequate performance can be obtained. In other cases, a by-product may have attributes superior to those of traditional earthen materials with well-controlled and superior properties. This paper describes beneficial reuse applications in the gray iron foundry industry that has been investigated at the University of Wisconsin-Madison. These applications include embankments, retaining walls, sub-base, flowable fills, barrier layers, and HMA mixtures.

Language

  • English

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Filing Info

  • Accession Number: 00987963
  • Record Type: Publication
  • ISBN: 0784407444
  • Report/Paper Numbers: Volume I
  • Files: TRIS
  • Created Date: Mar 24 2005 12:00AM