Minnesota Department of Transportation

511 Travel Info

Road Research

NRRA Rigid Team

Performance of Concrete Overlays over Full Depth Reclamation (FDR)

Status: Complete
Project End Date: June 30, 2022


As the infrastructure ages, it is getting harder for the agencies to maintain it. Full Depth Reclamation has several advantages and combining these advantages with the durability of concrete overlays might be the answer for agencies to provide high quality infrastructure with lower public funds.

Full Depth Reclamation (FDR) decreases the landfilled materials and transportation demands. This will not only decrease the cost but will also be more environmentally friendly. The environmental effects of the projects will be lower.

Concrete overlays can serve as a sustainable and cost-effective solution. They do not need major rehabilitation and they usually perform longer than expected. With lower need for maintenance and longer service life, concrete overlays offer lower life cycle costs and lower environmental impacts.

When you combine these benefits of FDR with concrete overlays, there is promise of more durable infrastructure with lower environmental impacts.

In this proposal we will investigate the current situation of concrete overlays that were built over different types of FDR.

Pavement condition data such as transverse cracking, longitudinal cracking, D-cracking, joint spalling, and faulting will be collected. Coring will be done to investigate thickness and strength of concrete pavement and FDR. Falling Weight Deflectometer (FWD) and Ground Penetrating Radar (GPR) will also be done to evaluate the situation of the concrete pavement and its bases.

Concrete overlay parameters, such as overlay type, thickness, age, and joint spacing; and Full Depth Reclamation properties such as type, strength and thickness properties will be investigated; and long-term performance trends will be established.

The objective of the study is to measure the performance of concrete overlays on different Full Depth Reclamations.


Task 1: Literature review

Task 2: Determine 5 projects that will be investigated concrete overlays on FDR

  • Deliverable: List of 5 projects determined by TAP from candidate projects
  • Date due: December 15, 2020

Task 3: Testing project 1

  • Deliverable: Test Results of 1 project visit November 2020 (FWD, GPR, Core results, joint layout and crack mapping)
  • Date due: December 31, 2020

Task 4: Testing projects 2, 3, 4, 5

  • Deliverable: Test Results of 2 projects June 2021 (FWD, GPR, Core results, joint layout and crack mapping)
  • Date due: June 15, 2021

Task 5: Data analysis

Test data with available project details will be analyzed.

  • Deliverable: Test results
  • Date due: July 31, 2021

Task 6: TAP presentation

Results presentation to TAP to draw conclusions.

  • Deliverable: Results presentation
  • Date due: August 31, 2021

Task 7: Draft report

  • Deliverable: Draft report
  • Date due: November 30, 2021

Task 8: Final report

  • Deliverable: Final Report, 3/2023
  • Date due: December 30, 2021

Project team

Email the Project Team
Principal Investigator:
Tumer Akakin, Ph.D., P.E., Aggregate Ready-Mix Association of Minnesota, takakin@armofmn.com
Technical Liaison: Tom Burnham, MnDOT, tom.burnham@state.mn.us
Project Technical Advisory Panel (TAP):

  • Terry Beaudry, MnDOT
  • Rob Golish, MnDOT
  • James Krstrulovich, ILDOT
  • Angel Mateos, UC Berkeley
  • T.J. Murphy, NDDOT
  • Peter Taylor, Iowa State University

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