RECYCLED RUBBLE SAVES CONTRACTORS MONEY

THE FEASIBILITY OF USING RECYCLING METHODS WITHOUT ENVIRONMENTAL DISTURBANCE IN A CROWDED METROPOLITAN AREA WAS DEMONSTRATED BY USE OF A PORTABLE PLANT WHICH PRODUCED 10,000 CU YD OF 1.5 - IN. CLASS AGGREGATE BASE FROM 14,000 TONS OF CONCRETE AND ASPHALT. THE CRUSHED MATERIAL CONTAINED ADEQUATE FINES AND SMALL AMOUNTS OF UNHYDRATED CEMENT. THIS AIDED COMPACTION WHEN MIXED WITH WATER AND WAS APPROVED BY STATE INSPECTORS FOR SUBBASE. WHEN PROCESSING SUCH MATERIAL AS STREET PAVING, CURBS AND ASPHALT, THE CONTINUOUS OPERATION OF THE TWO-STAGE CRUSHING SYSTEM PRODUCED APPROXIMATELY 350 TPH. THE DRYING OF MATERIAL, THE REMOVAL OF TRASH AND STEEL AND THE PROBLEM OF SOFT ASPHALT IN WARM WEATHER MAKE IT DIFFICULT TO MAINTAIN CONTINUOUS OPERATION. A CATERPILLAR 980 WHEEL LOADER WITH A 5 CU YD BUCKET PUT RUBBLE ONTO A TYPE H TELSMITH VIBRATING FEEDER HAVING A BAR GRIZZLY SET AT 3 IN. AND DRIVEN BY A 30 HP ELECTRIC MOTOR. BLOCKS OF CONCRETE UP TO 4 FT SQUARE WERE DROPPED TO THE 30 BY 42 IN. PRIMARY JAW CRUSHER POWERED BY A 150 - HP ELECTRIC MOTOR. DETAILS ARE GIVEN OF THE OPERATION. THE BENEFITS OF THE USE OF THIS SYSTEM INCLUDE A SAVING IN COST AND A SAVING IN SCARCE LANDFILL AREAS. ECOLOGICAL CONTRIBUTIONS ARE SEEN IN ITS HELP IN PROLONGING GRAVEL PIT LIFE AND IN REDUCING TRUCK TRAFFIC. PROBLEMS ENCOUNTERED IN THE PRACTICE OF THIS OPERATION ARE DISCUSSED. THE AVAILABILITY OF QUALITY CONCRETE OR ASPHALT RAW MATERIAL IS IMPORTANT AS THIS IS A FACTOR IN THE LOSS OF TIME CAUSED BY EXCESS STEEL AND REFUSE. FREQUENT MOVING RESULTS IN HIGH MAINTENANCE COSTS. ATTENTION MUST BE PAID TO THE ABATEMENT OF NOISE AND AIR POLLUTION.

• Publication Date: 1973-4

Media Info

• Features: Photos;
• Pagination: p. 80-3
• Serial:
  • Roads and Streets
  • Volume: 116
  • Issue Number: 4
  • Publisher: Donnelley (Reuben H) Corporation

Subject/Index Terms

• TRT Terms: Aggregates; Asphalt; Benefits; Concrete; Feasibility analysis; Operations; Portable equipment; Recycling; Rubble
• Old TRIS Terms: Low costs
• Subject Areas: Administration and Management; Geotechnology; Highways;

Filing Info

• Accession Number: 00217931
• Record Type: Publication
• Files: TRIS
• Created Date: May 15 1974 12:00AM