TY  - JOUR
AU  - Leroy, Philippe
AU  - Hördt, Andreas
AU  - Gaboreau, Stéphane
AU  - Zimmermann, Egon
AU  - Claret, Francis
AU  - Bücker, Matthias
AU  - Stebner, Hermann
AU  - Huisman, Johan Alexander
TI  - Spectral induced polarization of low-pH cement and concrete
JO  - Cement and concrete composites
VL  - 104
SN  - 0958-9465
CY  - Amsterdam [u.a.]
PB  - Elsevier Science68442
M1  - FZJ-2019-04436
SP  - 103397
PY  - 2019
AB  - Concrete is the most used material for civil and industrial infrastructures. In the context of a geological disposal of nuclear waste, concrete performance may be degraded when in contact with the host formation. The ability to monitor the changes of the concrete properties using the spectral induced polarization (SIP) method is therefore of great interest. In our study, SIP laboratory measurements in the 100 mHz to 45 kHz frequency range were carried out on low-pH cement and concrete. These materials exhibited a very high resistivity (mostly above 10 kΩ m) and a high phase shift (mostly above 100 mrad) between measured voltage and injected current. The complex resistivity measurements were interpreted using electrochemical and microstructural membrane and Maxwell-Wagner polarization models. Relevant information on the mean pore size, pore size distribution, and connected porosity was obtained from SIP, opening up the possibility of using our approach to monitor concrete stability in-situ.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000501649500060
DO  - DOI:10.1016/j.cemconcomp.2019.103397
UR  - https://juser.fz-juelich.de/record/864769
ER  -