Nondestructive electrical conductivity test detects alkali-silica reaction in concrete

May 4, 2022, 9:30AMNuclear News
Alkali-silica reaction was confirmed at the Seabrook nuclear power plant in 2010. (Photo: NextEra Energy Resources)

Concrete structures built to last for decades, including reactor containment buildings and other nuclear power plant structures, are subject to the alkali-silica reaction (ASR), a reaction between alkali ions found in cement and silica, the two main components of concrete. The reaction forms a gel that absorbs water and expands over time, causing a buildup of pressure within the concrete that can eventually lead to cracking and deterioration.

Researchers at Argonne National Laboratory have successfully used electrochemical impedance spectroscopy (EIS) to detect ASR in the lab and believe it could be used for cost-effective, nondestructive testing at nuclear power plants.