Modelling reinforcement corrosion – usability of a factorial approach for modelling resistivity of concrete

Osterminski, Kai; Schießl, P; Volkwein, Andreas; Mayer, Till Felix

doi:10.1002/maco.200604017

Cited by 21 publications

(9 citation statements)

References 4 publications

(3 reference statements)

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“…If this percentage is overcome, condensation occurs in small capillary pores [13]. As the liquid in pores with continuity constitutes the conductive phase, these phenomena determine concrete resistivity in partially saturated concrete [3,14,18].…”

Section: Rh Influence On Resistivitymentioning

confidence: 99%

“…Although there is significant agreement on the applicability of Arrhenius equation to cementitious materials, concrete activation energy, E a , is found with variable experimental values in the literature: 24 [3], 19.7 [25], 27.17 [14], 25.7-31.9 [20], 16-30 [26], and 31.6 kJ/mol [27]. In this respect, the apparent activation energy would diminish when moisture content increases [20], in accordance with the saturation degree of concrete.…”

Section: Temperature Influence On Resistivitymentioning

confidence: 99%

“…Parameters that influence cementitious matrix microstructure and the chemistry of pore liquid affect concrete resistivity [14]. Chemical composition and cement content, as well as the w/c, influence concrete resistivity because they affect matrix microstructure and porosity.…”

Section: Introductionmentioning

confidence: 99%

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Influence of temperature and humidity on Portland cement mortar resistivity monitored with inner sensors

Zaccardi

Garcia

Huélamo

et al. 2009

Materials & Corrosion

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Concrete resistivity is directly related to relative humidity (RH) and is also affected by temperature. In this paper, a theoretical discussion about how these two factors affect resistivities of concrete and mortar is provided. Moreover, experimental results on sensorized mortar probes are presented and correlated to analytical models of temperature and humidity influences. All measurements were performed under controlled conditions. Temperature, RH, and resistivity were measured simultaneously in a particular zone of the probes. Temperature scanning was performed over short periods of time (approximately 1 h) and the probes were covered with waterproof paraffin each time for constant humidity content. This was feasible as all sensors were embedded. Water contents were ensured during the experiment by weighting the probes. Conclusions on the applicability of these techniques, their advantages, and limitations, and correlation to Archie and Arrhenius laws of the results are made.

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Section: Rh Influence On Resistivitymentioning

confidence: 99%

Section: Temperature Influence On Resistivitymentioning

confidence: 99%

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Influence of temperature and humidity on Portland cement mortar resistivity monitored with inner sensors

Zaccardi

Garcia

Huélamo

et al. 2009

Materials & Corrosion

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“…Concrete resistivity is strongly related with the concrete properties, such as specimen geometry, microstructure, concrete pore saturation, and exposure conditions. Meanwhile, it can be improved by following methods: (1) Decrease of moisture content [113], chloride ion [114], and temperature; (2) Increase in time of hydration; (3) Carbonation process [115]; (4) Inclusion of SCMs, fly ash [116], and furnace dust [117]. Essentially, large-pore concrete filled with highly connective water is an indication of a high resistivity, and vice versa.…”

Section: Electrochemical Methodsmentioning

confidence: 99%

A Recent Progress of Steel Bar Corrosion Diagnostic Techniques in RC Structures

Luo

Jun-nan

et al. 2018

Sensors

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Corrosion of steel bar is one of key factors undermining reinforced concrete (RC) structures in a harsh environment. This paper attempts to review the non-destructive procedures from the aspect of the corrosion measurement techniques, especially their advantages and limitations. Systematical classification of diagnostic methods is carried out to determine any probable corrosion issues before the structures become severe, and helps choose the suitable method according to different construction features. Furthermore, the three electrochemical factors method is introduced to inspire researchers to combine various techniques to improve corrosion evaluation accuracy. The recommendations for future work are summarized, in conclusion.

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“…The concrete resistivity is mainly dominated by the concrete moisture condition (Polder (2001), Osterminski et al (2012)) which can vary with time and within one structural element due to different exposure condition, e.g. unsheltered against rain.…”

Section: Half-cell Potential Measurementmentioning

confidence: 99%

Influence of Concrete Moisture Condition on Half-Cell Potential Measurement

Keßler¹,

Gehlen²

2016

Proceedings of the 5th International Conference on the Durability of Concrete Structures

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The detection of on-going corrosion is one of the main issues during inspection of reinforced concrete structures. The half-cell potential measurement method is the most common and established non-destructive technique to support this task. But a lot of infrastructures are exposed to rain or seawater which can cause heterogeneous moisture condition within one component. In turn this can have influence on the potential mapping results and as a consequence the interpretability of the half-cell potential measurement is impaired. This paper focuses on the influence of concrete moisture condition on half-cell potential measurement. Laboratory and practical tests results are analyzed qualitatively with varying moisture condition due to natural exposure and as well with different pre-wetting conditions. On the basis of these results recommendations are made how to evaluate halfcell potential mapping results. If large structures are inspected by half-cell potential measurements it is advantageous to compare only these parts which are in a comparable moisture condition by subdivision of the structure.

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Modelling reinforcement corrosion – usability of a factorial approach for modelling resistivity of concrete

Cited by 21 publications

References 4 publications

Influence of temperature and humidity on Portland cement mortar resistivity monitored with inner sensors

Influence of temperature and humidity on Portland cement mortar resistivity monitored with inner sensors

A Recent Progress of Steel Bar Corrosion Diagnostic Techniques in RC Structures

Influence of Concrete Moisture Condition on Half-Cell Potential Measurement

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