1999
DOI: 10.1080/08327823.1999.11688403
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Use of Microwave Reflectometry for Detecting Rebars Inside Concrete Structures

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Cited by 2 publications
(3 citation statements)
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“…n duct ¼ ÀixpR 2 duct e 0 1 À e c ð Þ; (12) where k is the free-space wave number in (11). As the wavelength is large relative to R bar , we infer from ln k ffiffiffiffi e c p R bar À Á in (11) that n bar is large in comparison with n duct even when R bar is smaller than R duct ; for example, n bar ¼ 1.1 Â 10 À3 Xm for R bar ¼ 7.5 mm while n duct ¼ 0.14 Â 10 À3 Xm for R duct ¼ 20 mm.…”
Section: Detecting Empty Ducts In Vicinity Of Steel Barsmentioning
confidence: 99%
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“…n duct ¼ ÀixpR 2 duct e 0 1 À e c ð Þ; (12) where k is the free-space wave number in (11). As the wavelength is large relative to R bar , we infer from ln k ffiffiffiffi e c p R bar À Á in (11) that n bar is large in comparison with n duct even when R bar is smaller than R duct ; for example, n bar ¼ 1.1 Â 10 À3 Xm for R bar ¼ 7.5 mm while n duct ¼ 0.14 Â 10 À3 Xm for R duct ¼ 20 mm.…”
Section: Detecting Empty Ducts In Vicinity Of Steel Barsmentioning
confidence: 99%
“…For the first application (which is of interest to construction engineers), the primary task is to detect steel bars embedded within concrete columns [10][11][12][13]. There is, in addition, the secondary task of detecting the presence of empty ducts inside such columns [14].…”
Section: Introductionmentioning
confidence: 99%
“…The problem is to detect reinforcement bars inside concrete columns [8][9][10][11]. In addition, a scheme for detection of empty ducts inside the column is also proposed.…”
Section: Introductionmentioning
confidence: 99%