RECYCLED CONCRETE

A DISCARDED CONCRETE DRIVEWAY THAT CONTAINED SILICEOUS AGGREGATES AND A LABORATORY CONCRETE BEAM THAT CONTAINED LIMESTONE AS COARSE AGGREGATE AND NATURAL SILICEOUS SAND AS FINE AGGREGATE WERE SELECTED. PORTIONS OF EACH KIND OF CONCRETE WERE PROCESSED INTO AGGREGATE SIZES. THREE TEST MIXTURES AND TWO CONTROL MIXTURES WERE MADE. SPECIMENS FROM EACH ROUND OF EACH MIXTURE WERE TESTED FOR COMPRESSIVE STRENGTH AT DIFFERENT AGES UP TO 6 MONTHS, FOR RESISTANCE TO ACCELERATED FREEZING AND THAWING, AND FOR VOLUME CHANGES DUE TO TEMPERATURE CHANGES OR TO MOISTURE EFFECTS AT A CONSTANT TEMPERATURE. THE AGGREGATE PARTICLES PRODUCED BY CRUSHING CONCRETE HAD GOOD PARTICLE SHAPE, HIGH ABSORPTION, AND LOW SPECIFIC GRAVITY BY COMPARISON WITH CONVENTIONAL NATURAL MINERAL AGGREGATES. IT IS CONCLUDED THAT THE PRESENT RESULTS ARE PROMISING FOR THE USE OF RECYCLED PAVEMENTS OR SIMILAR CONCRETES AS CONCRETE COARSE AGGREGATE AND PERHAPS AS FINE AGGREGATE. IF ADDITIONAL WORK TENDS TO SUPPORT THIS TENTATIVE CONCLUSION, THEN EXISTING SPECIFICATIONS SHOULD BE REVISED TO PERMIT AND ENCOURAGE THE USE OF THIS MATERIAL AS CONCRETE AGGREGATE SO THAT EXISTING SUPPLIES OF NATURAL AGGREGATES ARE CONSERVED AND THE AMOUNTS OF SOLID WASTES ARE REDUCED. THE RESULTS IN THIS WORK PERTAIN ONLY TO WASTE CONCRETE THAT IS FREE OF CONTAMINATION BY OTHER MATERIALS SUCH AS SULFATES.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1973/430/430-001.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309021596
• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Buck, A D
• Conference:
  • 52nd Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1973-1-22 to 1973-1-26
• Publication Date: 1973

Media Info

• Media Type: Print
• Features: References; Tables;
• Pagination: pp 1-8
• Monograph Title: Utilization of waste materials and upgrading of low-quality aggregates
• Serial:
  • Highway Research Record
  • Issue Number: 430
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Compression tests; Concrete; Concrete aggregates; Freeze thaw tests; Moisture content; Recycling; Temperature
• Old TRIS Terms: Compressive strength tests
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00217934
• Record Type: Publication
• ISBN: 0309021596
• Files: TRIS, TRB
• Created Date: Dec 22 1973 12:00AM