Demonstration of Electro-Osmotic Pulse (EOP) Technology to Mitigate Alkali-Silica Reaction in Concrete Pavement. Final Report on Project F08-AR24
ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN United States
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All Department of Defense DoD, Army, federal government, and private-sector facilities experience the problem of concrete deteriorating via alkali-silica reaction ASR. ASR is a form of concrete corrosion that slowly deteriorates concrete from the inside by forming highly expansive gels that cause cracking and swelling of the concrete matrix. This project evaluated Electro-Osmotic Pulse EOP technology to mitigate ASR in an area of the visitors ramp at Campbell Army Airfield. An EOP system was designed, installed, and monitored in a concrete pavement section affected by ASR. In addition to installing EOP technology, concrete moisture monitoring probes were installed at selected locations. The performance of the EOP system was evaluated by recording temperature and moisture levels inside the concrete for a period of nine months. The ability of the EOP system to mitigate ASR is inconclusive. Although there are indications that moisture is being removed from the concrete pavement, it is not clear that the concretes internal relative humidity has been reduced below 80, the moisture reduction value that ensures ASR will not occur. The calculated return on investment ROI for the project was 5.68. However, a long-term approach for performance monitoring must be completed before the technology can be recommended.
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