To investigate the performance of recycled concrete aggregates (RCA), physical test data from 1977 through 1982 are summarized in order to present typical characteristics of the RCA material. In situ deflection test results on various projects since 1974 are summarized. Deflection testing was performed on pavements constructed with crushed stone, asphaltic concrete, and recycled crushed concrete base courses. Analysis of the data indicates that the pavements constructed with recycled crushed concrete bases have strengths equal to or higher than stone or asphalt base pavements. The results of both laboratory work and test pavement experiments on the use of RCA in asphaltic concrete mixtures are also presented. In both cases it was found that the RCA-asphalt mixtures have 1.5 to 2.0 times the stability and are 15 percent lighter than a standard crushed stone-natural sand mix. In addition, the RCA mixture requires 0.5 to 1.0 percent more asphalt cement to have equal air voids and filled criteria. Finally, data from the Texas State Department of Highways and Public Transportation's long-term experience with the use of RCA-asphalt mixes are presented.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 19-26
  • Monograph Title: Mineral aggregates
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00450247
  • Record Type: Publication
  • ISBN: 0309037735
  • Report/Paper Numbers: HS-038 693
  • Files: TRIS, TRB
  • Created Date: Feb 28 1986 12:00AM