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GPR detection of saturated areas into concrete in the presence of a water gradient
Louis, Arnaud; Van der Wielen, Audrey; Courard, Luc et al.
2012In 2012 14th International Conference on Ground Penetrating Radar (GPR)
Peer reviewed
 

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Keywords :
Ground Penetrating Radar; Saturated areas; concrete; reflection coefficient; modelisation; water gradient
Abstract :
[en] In the concrete, saturated areas are most of the time limited by a transition zone, presenting a water gradient. This transition zone can affect the GPR wave’s reflection and decrease the reflection coefficient by comparison to the coefficient that would be obtained on a sharp interface. To quantify the impact of the water gradient on the reflection coefficient, we performed finite differences simulations. They showed that the reflection coefficient was reduced by 70% if the thickness of the transition zone was larger than 2/5 of the wavelength. Laboratory experiments, using hygrometric sensors for the water content control, confirmed this trend.
Disciplines :
Materials science & engineering
Author, co-author :
Louis, Arnaud ;  Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil
Van der Wielen, Audrey ;  Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil
Courard, Luc  ;  Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil
Nguyen, Frédéric ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géophysique appliquée
Language :
English
Title :
GPR detection of saturated areas into concrete in the presence of a water gradient
Publication date :
June 2012
Event name :
The 14th international conférence on Ground Penetrating Radar
Event organizer :
Tongji University
Event place :
Shanghai, China
Event date :
du 4 au 8 juin 2012
Audience :
International
Main work title :
2012 14th International Conference on Ground Penetrating Radar (GPR)
Publisher :
IEEE
ISBN/EAN :
978-1-4673-2660-5
978-1-4673-2663-6
978-1-4673-2661-2
Pages :
477-482
Peer reviewed :
Peer reviewed
Available on ORBi :
since 26 June 2012

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