Development of a 2nd Generation Neutron-Based Detector for Chloride in Concrete

The goal of this project was to develop an advanced nondestructive test instrument for measuring chlorides in concrete using a prompt gamma neutron activation (PGNA) system with electronic collimation. The current method of chloride analysis in concrete is destructive and time-consuming, and consequently is not done frequently in the field. The proposed system will permit regular nondestructive inspection of structures for possible risk of chloride-promoted rebar corrosion with improved spatial resolution. This information in turn would be used to develop a strategic approach to bridge maintenance and repair for chloride deterioration.

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