CRUSHING CONVERTS RUBBLE INTO SUBBASE AGGREGATE

IN CALIFORNIA, RUBBLE FROM CONCRETE AND ASPHALT PAVING IS BEING CONVERTED INTO VALUABLE RAW MATERIALS WITH VERY LITTLE EFFORT AND EXPENDITURE. THE TWO STAGE SYSTEM HAS PRODUCED SOME 65,000 TONS OF MINUS 3/4 IN. BASE AND CEMENT TREATED OF MATERIALS AND TRUCKING THEM TO THE SITE. THE CRUSHING PLAN EASILY PRODUCED 300 TPH, BUT BECAUSE OF INTERMITTENT OPERATION OF TRUCKS AND THE NEED TO CAREFULLY POLICE THE MATERIALS GOING INTO THE LOADING HOPPER, AVERAGE PRODUCTION IS CLOSER TO 150 TPH ON A CONTINUOUS BASIS. COMPACTION TESTS HAVE DEMONSTRATED THAT THE CRUSHED RUBBLE IS SUPERIOR TO MANY PLANT RUN AGGREGATES. NOT ONLY DOES IT COMPACT BETTER, BUT IT TRIMS EASIER AND CLEANER. THIS EFFECT IS ATTRIBUTED TO UNHYDRATED CEMENT IN CONCRETE RUBBLE THAT BECOMES A BINDER WHEN EXPOSED BY CRUSHING AND MIXED WITH WATER.

• Supplemental Notes:
  • Vol 114, No 5, PP 44-45, 2 PHOT
• Publication Date: 1971-5

Media Info

• Serial:
  • Roads and Streets
  • Publisher: Donnelley (Reuben H) Corporation

Subject/Index Terms

• TRT Terms: Asphalt pavements; Concrete pavements; Crushed aggregates; Raw materials; Rubble; Utilization
• Subject Areas: Geotechnology; Highways; Research;

Filing Info

• Accession Number: 00217902
• Record Type: Publication
• Files: TRIS
• Created Date: May 1 1972 12:00AM