Joint inversion of electromagnetic measurements for the determination of water saturation profiles in concrete structures

Alhajj, Marie Antoinette; Bourguignon, Sébastien; Palma-Lopes, Sérgio; Villain, Géraldine

doi:10.1016/j.cemconres.2021.106500

Cited by 8 publications

(2 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Four resistivities values were determined by Res1D related to four layers with different thicknesses and then they were displayed at the center of each layer (5.1, 16.57, 30.92 and 44.45 mm). The second inversion method called CERIS developed to get moisture profiles [14,24] was carried out using an optimized model parameterization in order to increase the number of layers based on a realistic resistivity profile shape. The resistivity profile was adjusted with the Weibull curve equation.…”

Section: Apparent Resistivity Inversionmentioning

confidence: 99%

Monitoring chloride diffusion in BFS concrete using an Electrical Resistivity Tomography device

Achrafi¹,

Villain²,

Bonnet³

2022

eJNDT

View full text Add to dashboard Cite

Corrosion of steel bars in Reinforced Concrete (RC) due to the penetration of chlorides coming from seawater is one of the main pathologies leading to degradation of marine structures. Destructive Evaluation (DE) methods like coring from concrete in such marine environment are difficult and expensive for the survey of marine RC structures. Whereas, Non-Destructive Evaluation (NDE) methods based on the wave propagation (electric and electromagnetic) can reduce the number of cores necessary to evaluate the health of the studied structures. The aim of this work is to study the chloride ingress into saturated concrete by using the NDE methods and especially the Electrical Resistivity Tomography device. Accordingly, chlorides diffusion campaign with two different chloride concentration ([NaCl] = 35 and 90 g/L) was carried out on two slab of concrete contains slag addition. Apparent resistivities are then inverted in order to obtain a resistivity profile versus depth with two different software: Res1D and Ceris. Moreover, resistivity measurements were performed regularly on the slabs to obtain the resistivity profiles. On the other hand, a calibration method was realized to relate the resistivity to the chloride content for each type of concrete. The chloride profiles evaluated by NDT are then compared to those obtained by a destructive method (potentiometric titration) at three different exposure periods. The long-term goal is to use directly the NDE results in the model of chloride ingress into saturated concrete

show abstract

Section: Apparent Resistivity Inversionmentioning

confidence: 99%

Monitoring chloride diffusion in BFS concrete using an Electrical Resistivity Tomography device

Achrafi¹,

Villain²,

Bonnet³

2022

eJNDT

View full text Add to dashboard Cite

show abstract

“…The effectiveness of electrically-based methods is mainly due to the relationships between electrical measurement results and porous properties of the target. For instance, there are quite strong correlations between electrical parameters and water saturation in porous materials [6][7][8][9][10][11], and electrical parameter change in cement-based materials can match the load-deflection curve quite well in strength tests [12,13]. Also, the electrical parameters of cement-based materials have correspondence with different stages of the hydration reaction [14][15][16] as well as with alkali-silicate reaction, delayed ettringite formation and the pozzolanic effect [17,18].…”

Section: Introductionmentioning

confidence: 99%

Exploration on electrical resistance tomography in characterizing the slurry spatial distribution in cemented granular materials

Wang,

Jin

et al. 2024

Front. Struct. Civ. Eng.

View full text Add to dashboard Cite

This study investigated the application of electrical resistance tomography (ERT) in characterizing the slurry spatial distribution in cemented granular materials (CGMs). For CGM formed by self-flow grouting, the voids in the accumulation are only partially filled and the bond strength is often limited, which results in difficulty in obtaining in situ samples for quality evaluation. Therefore, it is usually infeasible to evaluate the grouting effect or monitor the slurry spatial distribution by a mechanical method. In this research, the process of grouting cement paste into high alumina ceramic beads (HACB) accumulation is reliably monitored with ERT. It shows that ERT results can be used to calculate the cement paste volume in the HACB accumulation, based on calibrating the saturation exponent n in Archie’s law. The results support the feasibility of ERT as an imaging tool in CGM characterization and may provide guidance for engineering applications in the future.

show abstract

Electrical resistivity tomography results analyzed with two inversion methods to determine chloride profiles on BFS concrete having very high electrical resistivity

EL Achrafi,

Bonnet,

Villain

2023

Construction and Building Materials

View full text Add to dashboard Cite

Joint inversion of electromagnetic measurements for the determination of water saturation profiles in concrete structures

Cited by 8 publications

References 55 publications

Monitoring chloride diffusion in BFS concrete using an Electrical Resistivity Tomography device

Monitoring chloride diffusion in BFS concrete using an Electrical Resistivity Tomography device

Exploration on electrical resistance tomography in characterizing the slurry spatial distribution in cemented granular materials

Electrical resistivity tomography results analyzed with two inversion methods to determine chloride profiles on BFS concrete having very high electrical resistivity

Contact Info

Product

Resources

About