The National Road Research Alliance (NRRA) is hosting “Developing Best Practices for Rehabilitation of Concrete with Hot Mix Asphalt (HMA) Overlays Related to Density and Reflective Cracking” on October 19 at 10 a.m. CST, presented by by Eshan Dave and Katie Haslett, University of New Hampshire.
Continue reading Research Pays Off Webinar Series: Developing Best Practices for Rehabilitation of Concrete with Hot Mix Asphalt (HMA) Overlays Related to Density and Reflective CrackingTag Archives: pavement
Research Pays Off Webinar Series: Performance Benefits of Fiber-Reinforced Thin Concrete Pavement and Overlays
The National Road Research Alliance (NRRA) is hosting “Performance Benefits of Fiber-Reinforced Thin Concrete Pavement and Overlays” on September 21 at 10 a.m. CST, presented by Manik Barman, University of Minnesota Duluth.
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Evaluating Pavement Thickness With 3D Ground-Penetrating Radar
Building on previous MnDOT-sponsored work, researchers have developed a nondestructive method of assessing pavement thickness using 3D ground-penetrating radar (GPR). A vehicle equipped with an array of transmitting and receiving antenna pairs travels at traffic speed collecting full-width GPR data for analysis, minimizing the amount of pavement coring required.
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Evaluating Cracking Resistance Test Methods for Asphalt Pavements
A new method of testing low-temperature cracking in asphalt pavement shows promise for design, quality control and quality assurance. Test results produced by the new method, which is faster and less expensive than the previous method, match well with results from the older method.
Continue reading Evaluating Cracking Resistance Test Methods for Asphalt PavementsResearch Pays Off Webinar Series: Determining Pavement Design Criteria for Recycled Aggregate Base and Large Stone Subbase
The National Road Research Alliance (NRRA) is hosting “Research Pays Off: Determining Pavement Design Criteria for Recycled Aggregate Base and Large Stone Subbase” on April 20 at 10 a.m. CST, presented by Bora Cetin, Ph.D., Michigan State University and Raul Velasquez, Ph.D., P.E., Minnesota Department of Transportation.
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New Project: Have Minnesota’s Warmer Winters Increased the Number of Freeze Thaw Cycles?
Minnesota is experiencing warmer winters and an increase in freeze-thaw events may negatively impact pavement systems. However, the impacts of these recent climate changes on freeze-thaw cycles have not been well studied.
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Pavement Preservation Techniques for Local Agencies
Cities and counties need affordable pavement preservation treatments, but preservation strategies are often geared towards higher-volume roads. The Minnesota Local Road Research Board has developed new guidance on five lower-cost treatments that is more applicable to local agencies and can be used to preserve pavements based on the type and severity of pavement distress.
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High-Density Asphalt Pavement Mixtures Viable with local Aggregates
Researchers developed sophisticated models for high-density asphalt pavement mixtures. After calibrating the model to experimental data available from 5 percent air void asphalt mixtures, the research team conducted tests on three Minnesota mixtures to further refine the model. A Phase II study will develop multiple high-density mix designs for Minnesota applications.
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Recycling Asphalt Pavement Offers Strong Alternative to New Aggregate Base
In a newly completed study, researchers found that stabilized full-depth reclamation has produced stronger roads for commercial loads in Minnesota, and the method shows promise for uses in rural agricultural areas. How much greater the strength gained with each stabilizing agent is better understood, though not conclusively.
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Rout-and-Seal Offers Slight Cost–Benefit Over Clean-and-Seal Repairs
In a recently completed study, Minnesota researchers compare the performance and cost-benefit of the clean-and-seal versus rout-and-seal techniques for repairing asphalt pavement cracks.
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