Effect of RAP Concrete Ductility on Critical Stress Analysis for Rigid Pavements

The use of reclaimed asphalt pavement (RAP) material in concrete pavement has been identified to greatly improve the toughness and energy absorbing capacity of Portland Cement Concrete (PCC). However, most finite element (FE) models characterize concrete material as a linear elastic material even though RAP concrete behavior actually exhibits non-linear stress-strain behavior. The current lack of material property model that enables to appropriately characterize the RAP concrete is probably the greatest shortcoming to accurately predict the change in structural response of PCC pavement including RAP material. In this study, a non-linear 3-D FE model in consideration of the actual stress-strain behavior of the RAP concrete was developed to evaluate how the non-linear stress-strain behavior affects the prediction results of the stresses in ductile concrete as compared to typical linear elastic model. The results indicated that the linear elastic model provides overestimated maximum concrete tensile stresses as compared with those predicted using actual stress-strain model. Consequently, this overestimated result will lead to underestimated potential performance of the concrete pavement containing RAP. Therefore, a non-linear model incorporating with the actual stress-strain response characteristics should more accurately predict the structural responses of the RAP concrete pavement in lieu of the typical material property model that assumes the concrete as a linear elastic material.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFN20 Standing Committee on Properties of Concrete.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Kim, Kukjoo
  • Chun, Sanghyun
  • Park, Bongsuk
  • Tia, Mang
  • Bergin, Michael J
• Conference:
  • Transportation Research Board 96th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2017-1-8 to 2017-1-12
• Date: 2017

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 14p
• Monograph Title: TRB 96th Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Concrete pavements; Ductility; Finite element method; Mathematical models; Reclaimed asphalt pavements; Rigid pavements; Stresses
• Uncontrolled Terms: Nonlinear analysis; Structural response
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01628589
• Record Type: Publication
• Report/Paper Numbers: 17-01351
• Files: TRIS, TRB, ATRI
• Created Date: Mar 7 2017 5:27PM