Advancing Forensic Investigation of Concrete Distresses at VTRC with Focus on Alkali-Ailica Reaction (ASR)

About the project:

TRC plays a pivotal role in supporting VDOT by providing technical assistance to districts in addressing field-related issues. Traditionally, forensic investigations conducted by VTRC have relied on petrography, primarily utilizing light microscopy techniques such as stereo and polarizing light microscopy. While effective, this approach has inherent limitations, including labor-intensive sample preparation, reliance on visual assessments, and subjectivity in interpretation. Moreover, the current dependency on external consultants for forensic evaluations results in significant costs and delays, impacting timely decision-making.

To address these challenges, VTRC is modernizing its forensic investigation capabilities by integrating advanced analytical instruments, including Raman spectroscopy and Scanning Electron Microscopy (SEM).These techniques not only reduce subjectivity but also improve the accuracy, efficiency, and reliability of forensic assessments.

The adoption of these technologies will significantly enhance VTRC’s ability to investigate key durability concerns such as alkali-silica reaction (ASR), delayed ettringite formation (DEF), and sulfate attack. Furthermore, future expansions of this research will explore applications in chloride diffusion, freeze-thaw resistance, air content analysis, and thermal distress assessments. Additionally, the development of a comprehensive database and algorithm for data interpretation will further refine forensic evaluations, ensuring consistency 

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