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6890895 
Journal Article 
Ground penetrating radar as an alternative to radiography 
De Souza, T; , 
2005 
0 
Insight
ISSN: 1828-6577 
BRITISH INST NON-DESTRUCTIVE TESTING 
NORTHAMPTON 
414-415 
WOS:000230554600010 
Ground penetrating radar (GPR) is becoming an increasingly popular method for concrete inspection. Traditionally, radiography has been utilised by industry professionals who need to determine what is embedded in concrete. GPR provides an alternative to radiography with several distinct advantages including rapid surveying of a concrete slab and minimal disruption to the surrounding areas. The basic principle of operation is to transmit a broadband high-frequency electromagnetic (EM) pulse into the concrete and detect the reflected pulse. GPR not only locates objects in concrete, it also provides quantifiable parameters on these objects, such as rebar depth, rebar spacing and slab thickness.