Resistivity of Repair Materials for Concrete Repair Prior to the Application of a Cathodic Protection System

Belleghem, Bjorn Van; Maes, Mathias; Soetens, Tim

doi:10.1007/978-3-031-21735-7_90

Cited by 1 publication

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the overlay mortar and each concrete mix, additional specimens are cast (100 mm x 100 mm x 50 mm), identically cured and stored as the concrete prisms and the resistivity of the samples is determined by means of the two-electrode method as described in [8] using an LCR meter at 120 Hz. Therefore, two stainless steel rebars (diameter 6 mm and length 150 mm) are embedded in the concrete/mortar specimens with a spacing of 50 mm.…”

Section: Test Set-upmentioning

confidence: 99%

Influence of various parameters on the current distribution and protection degree of impressed current cathodic protection for reinforced concrete with TiMMO mesh anodes

et al. 2023

View full text Add to dashboard Cite

Impressed current cathodic protection (ICCP) is an effective technique to control reinforcement corrosion in concrete structures. The efficiency and design of an ICCP system with titanium mixed metal oxide (TiMMO) anodes in a mortar overlay is strongly influenced by the current distribution to the different reinforcement layers of a reinforced concrete element. An in-depth experimental study is performed to investigate the effect of various parameters on the current distribution and degree of corrosion protection: (i) chloride content, (ii) cement type, and (iii) reinforcement configuration. 24-hour depolarization measurements (EN ISO 12696:2022) indicate that an increase in chloride concentration in the concrete, related to an increase in the rate of reinforcement corrosion, leads to a general decrease in the degree of protection. The use of a CEM III/A cement leads to a large increase in concrete electrical resistivity compared to concrete with an ordinary Portland cement (CEM I). This causes a lower total current output to the reinforcement and a less uniform distribution of current. Finally, a lower steel reinforcement density resulted in a larger current density, as the total current is distributed over a smaller steel surface area, causing higher depolarization values.

show abstract

Section: Test Set-upmentioning

confidence: 99%