New Tools Help Find Flawsby Kneeland A. Godfrey, Jr., Sr. Editor;
Serial Information: Civil Engineering—ASCE, 1984, Vol. 54, Issue 9, Pg. 39-42
Document Type: Feature article
Errata: (See full record)
Certain electromagnetic tools for nondestructive evaluation of existing infrastructure, though not widely used, can cut cost and time of identifying flaws in existing infrastructure. Five such tools are described, with their limitations, and case histories illustrate their use. Infrared thermography senses temperature differences in delaminated areas of bridge decks. Ground penetrating radar can measure depth of subpavement voids and cavities formed around pipes. Acoustic emission detects flaws in structures and leaks in pressure water pipes. Electrical resistivity can pinpoint leaks within a dike. Streaming potential can show the extent of a leachate plume in groundwater.
Subject Headings: Water pressure | Pressure pipes | Bridge decks | Pipe leakage | Case studies | Imaging techniques | Thermal effects
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