Sustaining Performance of ASR-Affected Pavements: Effective Practices and Insights Status: CompleteReport Date: 07/09/2025 Summary: Study results confirm that MnDOT’s actions to repair deteriorating concrete roads have a measurable positive effect on road surface conditions. Using metrics for road smoothness and rider perception, researchers compared these ratings to the timing of repair efforts by the agency, noting an uptick after work was completed. The cause of the pavement deterioration, found in roads built in the 1980s and 1990s, is a chemical interaction between alkali and silica, two components in concrete mixtures. The alkali-silica reaction occurs when moisture is present, causing stress within the concrete that leads to cracking and progressive, irreversible damage. Final Deliverables: Sustaining Performance of ASR-Affected Pavements: Effective Practices and Insights (Report #2025-29) Strategies for Addressing Deteriorated Concrete Roads (Research Summary) Related Materials: Strategies for Addressing Deteriorated Concrete Roads (Blog Post) Related Research:
