Ways of salvaging aggregate or using substitutes are reviewed. Salvaging discarded battery cases for aggregate making, the use of glasphalt (asphaltic concrete using broken scrap glass), the stretching of aggregate by lime, cement or calcium chloride stabilization of base materials, and the econocrete method are described. In the econocrete method, Portland cement is mixed with crusher-run or other locally available aggregate to serve as the bottom layer of a 2-course slab. In the City of Minneapolis, crushed waste sidewalks and other paving materials have been used to make pavement bases. Dirt, old asphalt, clay rock, concrete and whatever else may be present at paving sites have been run through a crusher plant. However, a major problem of recycling Portland cement concrete is the presence of reinforcing steel. Ways for moving aggregate from the source to the site include the use of 100-ton trucks, unit trains, and cooperative railroad shipping. Greater use can also be made of precast and prestressed concrete forms in aggregate-short markets. The growing use of prestressed concrete panels for walls, floors, roofs, bridges, etc. also cuts down on labor costs. The use of manufactured sand is also advocated. Concrete made with such sand is as strong as that with natural sand.

  • Corporate Authors:

    Construction Publishing Company

    2420 Wilson Boulevard
    Arlington, VA  United States  22201
  • Publication Date: 1976-7-19

Media Info

  • Features: Photos;
  • Pagination: p. 62-64
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00141255
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 26 1976 12:00AM