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This paper outlines developments in the use of an embedded multi-electrode sensor to study the response of the cover-zone (surface 50mm) to the changing ambient environment. The sensor enables the measurement of the spatial and temporal distribution of the electrical properties of concrete and temperature within the cover-zone thereby allowing an integrated assessment of cover-zone concrete performance. Both laboratory and field results are presented to highlight the information that can be obtained from embedded sensors. When exposed to the natural environment, the temperature dependence of the electrical response is highlighted and standardization protocols are developed to account for this effect. The monitoring system detailed also allows remote interrogation thereby providing (if required) a continuous output of real-time data and developments in this area are presented.
McCarter, W., Chrisp, T., Starrs, G., Holmes, N., Basheer, L., Basheer, M., Nanukuttan, S.: Developments in Monitoring Techniques for Durability Assessment of Cover-Zone Concrete. 2nd International Conference on Durability of Concrete Structures, Sapporo, Japan, November, 2010.