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Research Topics

• MnROAD
• Pavement Surface Characteristics
• Intelligent Compaction
• Ground Penetrating Radar

Resources

• Pavement Interactive
• MnPave
• Seal Coat Design
• Test Section Tracking
• Seasonal Load Limits
• Construction Tools
• Mn/DOT Library
• Research Services

Organizations

• Local Road Research Board
• Transportation Engineering and Road Research Alliance
• Long Term Pavement Performance
• Transportation Research Board
• Center for Transportation Studies
• Center for Transportation Research and Education
• Shingle Recycling

 

Benefits of Mr Testing

• Measure of fundamental material property
• Dynamic load testing similar to traffic loading
• Essential input in mechanistic-empirical pavement design

 

Mr Summaries

• Resilient Modulus - Lab Testing Brief

• LRRB Can Cone Penetration Testing Measure the Resilient Modulus of Soils?
• LRRB Measuring the Material Properties of Aggregate Base Containing Recycled Materials

 

Field Modulus Measurements

• Light Weight Deflectometer (LWD)
• Intelligent Compaction (IC)

 

For more information:

 

Shongtao Dai, Road Research

 

John Siekmeier, Road Research

 

Luke Johannek, Road Research

 

 

What is Resilient Modulus?

Resilient Modulus (Mr) is a fundamental material property used to characterize unbound pavement materials. It is a measure of material stiffness and provides a mean to analyze stiffness of materials under different conditions, such as moisture, density and stress level. It is also a required input parameter to mechanistic-empirical pavement design method. Mr is typically determined through laboratory tests by measuring stiffness of a cylinder specimen subject to a cyclic axle load. Mr is defined as a ratio of applied axle deviator stress and axle recoverable strain. Learn about the MnDOT Resilient Modulus Testing Protocol and Data Quality Control Criteria.

 

Active Projects

• Best Value Granular Material for Road Foundations Work Plan Presentation
• Subgrade Stablization ME Properties Evaluation and Implementation Proposal

 

Completed Projects - Not Yet Published

• Hydraulic, Mechanical, and Leaching Characteristics of Recycled Materials
• Use of Fly Ash for Construction of Bituminous Roads

 

Resilient Modulus Publications

• Investigation of Stripping in Minnesota Class 7 (RAP) and Full-Depth Reclamation Base Materials Report
• Pavement Design Using Unsaturated Soil Technology Report Technical Summary Presentation

• Resilient Modulus and Strength Of Base Course With Recycled Bituminous Material Report Technical Summary

• Moisture Effects on PVD and DCP Measurements Report
• Preliminary Laboratory Investigation of Enzyme Solutions as a Soil Stabilizer Report
• Small Strain and Resilient Modulus Testing of Granular Soils Report
• A Laboratory Technique for Estimating the Resilient Modulus of Unsaturated Soil Specimens from CBR and Unconfined Compression Tests Report

• Resilient Modulus of Minnesota Road Research Project Subgrade Soil Report

• Resilient Modulus Testing of Materials from MnROAD, Phase I Report