Mechanical Properties of Recycled Concrete Aggregate and Recycled Asphalt Pavement Reinforced with Geosynthetics

ABSTRACTMechanical properties of recycled concrete aggregate (RCA) and recycled asphalt pavement (RAP) were evaluated for use as backfill in mechanically stabilized earth (MSE) walls. Large scale triaxial compression tests, interface direct shear tests, and pull-out tests were conducted to evaluate interaction of RCA and RAP with geosynthetics. Consolidated drained triaxial tests under sustained axial stress were conducted to evaluate creep potential of compacted RAP. Results show the compacted RCA and RAP samples tested herein have internal friction angles (?') of 47o and 29o respectively which are within the typical range of ?' reported in the literature. Both RAP and RCA exhibited a higher interface friction angle (d') with geogrids than with geotextiles. No slippage was observed between the RCA-geotextile and RCA-geogrid and the failures were due to rupture of the geotextiles and geogrids during the pullout test. RCA has higher interaction coefficient (Ci) with geosynthetics than RAP. The interaction coefficients for both RCA and RAP increase with normal stress. Results from creep tests showed that compacted RAP exhibits large deviator strains under sustained deviator stresses. Use of RAP and RCA in MSE walls are recommended if reinforced with geogrids only. To prevent creep failure of compacted RAP, maximum deviator stress in the backfill should be limited to 80% of compressive strength of compacted RAP.

• Record URL:
  https://doi.org/10.1061/9780784482087.026
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784482087
• Supplemental Notes:
  • © 2019 American Society of Civil Engineers 2019
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Soleimanbeigi, A
  • Likos, W
• Conference:
  • Eighth International Conference on Case Histories in Geotechnical Engineering (Geo-Congress 2019)
  • Location: Philadelphia Pennsylvania, United States
  • Date: 2019-3-24 to 2019-3-27
• Publication Date: 2019-3

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 284-292
• Monograph Title: Geo-Congress 2019: Earth Retaining Structures and Geosynthetics

Subject/Index Terms

• TRT Terms: Concrete aggregates; Geosynthetics; Geotechnical engineering; Material reinforcement; Mechanical properties; Recycled materials
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 01715692
• Record Type: Publication
• ISBN: 9780784482087
• Files: TRIS, ASCE
• Created Date: Aug 30 2019 1:02PM