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Non-Destructive Testing (NDT) and Condition Evaluation

SDR Engineering has over 15 years experience in non-destructive testing (NDT) and condition evaluation. Our clients include the Florida, Georgia, and Texas Departments of Transportation. Our technical expertise in structural performance guarantees our clients the optimum solutions to structural repair and rehabilitation. We provide diagnostic testing, complete investigations, engineering support, construction services, and inspection.

The pictures below are examples of NDT work performed by SDR, mainly in the inspection and evaluation of post-tensioning tendons and strands in segmental concrete bridges. The majority of the work performed was by using the borescope method. A borescope consists of a miniature video camera attached to a cable.

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Inside Post-Tensioning Anchorage
Broken Strands Inside Internal Post-Tensioning Anchorage

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Steel Corrosion and Lack of Concrete Protection
Heavy Corrosion of Internal Pre-stressing Strands

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        Views Showing Strand Corrosion Within Post-tensioning Anchorages Without Grout

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