About 15,000 tons of rubble from an old concrete pavement was processed to produce about 5500 tons of 1.5 by 0 crushed concrete which meets the specifications for paving about 2 miles of approaches to a pair of replacement bridges on U.S. 75. About 15-0 tons of experimental material containing one part of crushed rubble and three parts of crushed concrete were also crushed. Production problems (and their resolution) encountered in the course of the work are discussed. The volume of fines in the finished product proved to a direct result of the care with which the operator of a Cat 225 hydraulic excavator picked up the broken concrete. A technique was worked out for breaking and loading out concrete rubble during dry, hot weather and stockpiling it near the primary crusher. The pavement was broken with a pneumatic hammer mounted on a backhoe. The tractor and excavator work together to peel off the asphalt resurfacing, load it into trucks, and separate it in stockpiles at the crushing plant. A portable stacking belt conveyor built a surge storage pile ahead of a secondary crushing system. The excavator was shuttled back and forth between the pavement and crushing plant on a trailer.

  • Availability:
  • Corporate Authors:

    Dun Donnelley Publishing Corporation

    222 South Riverside Plaza
    Chicago, IL  United States  60606
  • Publication Date: 1976-9

Media Info

  • Features: Photos;
  • Pagination: p. 30-31
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00145042
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 1 1977 12:00AM