Minnesota Department of Transportation

511 Travel Info

Road Research

NRRA Flexible Team

Orange barrels on a highway

Developing Best Practices for Rehabilitation of Concrete with Hot Mix Asphalt (HMA) Overlays related to Density and Reflective Cracking

Status:  Active
Project Start Date: Feb. 1, 2018
Project End Date: Jan. 31 2021

Project Summary:

Asphalt overlays are commonly used to rehabilitate deteriorated PCC pavements; however, mechanically or thermally-driven movements at joints and cracks in the underlying pavement usually lead to the development of reflective cracks in the overlay. The formation and propagation of reflection cracking is controlled by the mechanical properties of the asphalt and the condition of the overlaid pavement. Current state of practice for asphalt overlay design is policy oriented and lacking engineered design approach. There is need for establishing state of practice in design of overlays as well as for assessment of PCC pavement condition and recommending improvements to existing pavement prior to overlay construction. Objective of the proposed study is to develop a simple decision tree based tool for selecting suitable asphalt mixtures and overlay designs to prolong overlay lives by lowering reflective cracking and improving in-situ density. This research will leverage current NRRA effort of constructing, instrumenting and monitoring twelve MnROAD test sections, laboratory performance tests on asphalt mixtures from the test sections, and past field performance data. Proposed tool will incorporate field performance data, performance modelling, and life cycle cost analysis to develop best practices for rehabilitation of PCC with asphalt overlays.

Project Tasks/Status:
Original Need Statement: Developing Best Practices for Rehabilitation of Concrete with Hot Mix Asphalt (HMA) Overlays related to Density and Reflective Cracking (June 14, 2017)
Original Contract Link (we will modify)

Task 1: Literature Review

Task 2: Gathering Past Performance Data and Laboratory Testing
Task 3: Mechanistic Analysis of HMA Overlays
Task 4: Asphalt Density Evolution over Time
Task 5: Developing Life and Performance Curves for Asphalt Overlays and Analysis of the Performance Monitoring Completed by MnROAD Staff
Task 6: Establish State of the Practice for PCC Condition
Task 7: Establishment of State of the Practice for HMA Mixtures and Their Effects on Reflective Cracking
Task 8: Compile Report, Technical Advisory Panel Review, and Revisions
Task 9: Editorial Review and Publication of Final Report
Task 10: Out-of-State Travel

Related Contracts/Tasks:
Note any other supporting contracts

Principal Investigator:  Eshan V. Dave, University of New Hampshire
Technical Liaison:  Shongtao Dai, MnDOT
Project Technical Advisory Committee (TAP)Email the TAP
Shongtao Dai (MnDOT)
Charles Wienrank (IL)
Kevin Kennedy (MI)
Barry Paye (WI)
Daniel Oesch (MO)
Randy West (NCAT)
Zhanping You (MTU)
Andy Cascione (Flint Hills)
Tom Burnham (MnDOT)
Ed Johnson (MnDOT)
Chris Dulian (MnDOT)
James Bittmann (MnDOT)
Brandon Brever (MAPA)
Tim Andersen (MnDOT)
Cody Brand (MnDOT)
John Garrity (MnDOT)
Jerry Geib (MnDOT)

Related Materials

Final Report:      Expected Jan. 2021