TY - GEN
T1 - Laboratory validation of corrosion-induced delamination in concrete by ground penetrating radar
AU - Wong, Tin Wai Phoebe
AU - Poon, Chi Sun
AU - Lai, Wai Lok Wallace
PY - 2018/8/20
Y1 - 2018/8/20
N2 - This paper presents the preliminary findings of a laboratory study on using GPR signal to assess concrete delamination induced by rebar corrosion in reinforced concrete structures. A concrete slab was specially designed to produce horizontal cracking between the rebars by an electrochemical method in the laboratory environment, and the corrosion process is monitored by a 2 GHz ground penetrating radar in a time-lapsed manner. Data analysis include the amplitude change and velocity change of the GPR signal measured from the rebars. Both sets of data show that the amplitude of the reflected signal from the rebars are abnormally high by at least 30% in the corroded areas, whereas the travelling velocity does not show significant differences.
AB - This paper presents the preliminary findings of a laboratory study on using GPR signal to assess concrete delamination induced by rebar corrosion in reinforced concrete structures. A concrete slab was specially designed to produce horizontal cracking between the rebars by an electrochemical method in the laboratory environment, and the corrosion process is monitored by a 2 GHz ground penetrating radar in a time-lapsed manner. Data analysis include the amplitude change and velocity change of the GPR signal measured from the rebars. Both sets of data show that the amplitude of the reflected signal from the rebars are abnormally high by at least 30% in the corroded areas, whereas the travelling velocity does not show significant differences.
KW - concrete
KW - corrosion
KW - delamination
KW - ground penetrtaing radar
UR - http://www.scopus.com/inward/record.url?scp=85053415085&partnerID=8YFLogxK
U2 - 10.1109/ICGPR.2018.8441597
DO - 10.1109/ICGPR.2018.8441597
M3 - Conference article published in proceeding or book
AN - SCOPUS:85053415085
SN - 9781538657775
T3 - 2018 17th International Conference on Ground Penetrating Radar, GPR 2018
BT - 2018 17th International Conference on Ground Penetrating Radar, GPR 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 17th International Conference on Ground Penetrating Radar, GPR 2018
Y2 - 18 June 2018 through 21 June 2018
ER -