Spectral induced polarization of low-pH cement and concrete

Leroy, Philippe; Hördt, Andreas; Gaboreau, Stéphane; Zimmermann, Egon; Claret, Francis; Bücker, Matthias; Stebner, Hermann; Huisman, Johan Alexander

doi:10.1016/j.cemconcomp.2019.103397

Cited by 10 publications

(5 citation statements)

References 145 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The last technique is also used for estimating the size and distribution of aggregates in the structure. Spectral induced polarization can also provide relevant information on the mean pore size, pore size distribution and connected porosity of low pH concrete [58].…”

Section: Cement-based Materialsmentioning

confidence: 99%

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Rodrigues

Gaboreau

Gance

et al. 2021

Construction and Building Materials

Self Cite

203

View full text Add to dashboard Cite

Steel corrosion is the main cause of deterioration of reinforced concrete (RC) structures. We provide an up-to-date review on corrosion mechanisms and recent advances in electrical methods for corrosion monitoring. When assessing corrosion mechanism, the inherent heterogeneity of RC structures and the significant effect of environmental factors remain major issues in data interpretations. The steel surface condition and local inhomogeneities at the steel-concrete interface appear to have an important effect on corrosion initiation. Considering uniform corrosion in atmospherically exposed reinforced concrete, the two main influencing factors of the corrosion process are the water content and the pore structure at the steel-concrete interface. However, irrespective of the depassivation mechanism, i.e. carbonation or chloride-induced corrosion, nonuniform corrosion is expected to be the main process for RC structures due to local variations in environmental exposure or the presence of interconnected rebars with different properties. Future studies may then be focused on their effect on macrocell corrosion to gain further insights in the corrosion mechanisms of RC structures. Concerning corrosion monitoring using electrical methods, the half-cell potential technique with potential mapping is accurate for locating areas with a high corrosion risk. Recent developments in the measurement of concrete resistivity have shown that the use of electrical resistivity tomography allows to consider appropriately the inherent heterogeneity of concrete and provides more insights on transport phenomena (e.g. water and salts ingress) in the material. Nevertheless, during the corrosion propagation stage, the polarization resistance remains the most important parameter to be determined as it provides quantitative information of the corrosion rate. If conventional three-electrode configuration methods can supply an accurate determination in the case of uniform corrosion, they often fail in the case of macrocell corrosion in field experiments. Recent advances have shown that a four-electrode configuration without any connection to the rebar can rather be used for the non-destructive testing and evaluation of corrosion. If studies are still required to quantify the corrosion rate, this method appears sensitive to localized corrosion and thus more suitable to field investigations. Finally, the coupling of numerical simulations with complementary electrical and other non-destructive testing methods is essential for consolidating the results to provide a better diagnosis of the service life of RC structures.

show abstract

Section: Cement-based Materialsmentioning

confidence: 99%

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Rodrigues

Gaboreau

Gance

et al. 2021

Construction and Building Materials

Self Cite

203

View full text Add to dashboard Cite

show abstract

“…This type of interfacial polarization is called the Maxwell-Wagner polarization. 64,65 The presence of local maxima of σ″ at various frequencies comes from specific mechanisms related to, e.g., the grain size 22,32 or surface roughness 30 (both due to EDL polarization).…”

Section: Sip Measurement Techniquementioning

confidence: 99%

A microfluidic chip for geoelectrical monitoring of critical zone processes

et al. 2023

View full text Add to dashboard Cite

show abstract

“…This means that most of the connected pores (connected porosity) in both materials have pore-throat sizes below 7nm because mercury cannot penetrate these small pore-throats [v]. Indeed, the mean pore size measured with mercury intrusion porosimetry was < 15 nm (Leroy et al 2019) indicating that most of the connected porosity available for transport was nano-size, and the J o u r n a l P r e -p r o o f structure of concrete and micro-mortar was dense. Although some small changes could occur during the drying process of the samples, prior to the porosity measurement, the general observations are still valid (Zhang et al, 2019).…”

Section: Mechanical Propertiesmentioning

confidence: 99%