Effect of electrochemical chloride removal and ground granulated blast furnace slag on the chloride binding of cement paste subjected to NaCl and Na2SO4 attack

Lin, Yuanhua; Jiang, Linhua; Chu, Huaqiang; Guo, Ming-Zhi; Zhu, Zhenyu; Dong, Hua

doi:10.1016/j.conbuildmat.2019.06.033

Cited by 26 publications

(1 citation statement)

References 43 publications

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“…However, the extraction rates in terms of different chloride types was not accounted for. Yu et al (2019) stated that in the situation of coexisting attack from sulfate and chloride ions, cement paste experienced destabilization of bound chlorides under ECE. By increasing GGBS content from 0% to 30%, the content of bound chlorides in the vicinity of the steel bars first increased and then decreased.…”

Section: Of 19mentioning

confidence: 99%

Applicability of Electrochemical Chloride Extraction to Concrete Made With Different Binders

Lima¹

2023

Preprint

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The present study concerns the application of electrochemical chloride extraction to concrete designed with partial replacements of Ordinary Portland Cement (OPC) from different binders, namely ground granulated blast furnace (GGBS), pulverized fly ash (PFA) and Silica Fume (SF), to attend the need of corrosion repair for modern constructions. Electrochemical Chloride Extraction (ECE) was applied to the specimens at a current density of 2A/m2 for 4 weeks. The chloride types and binding mechanisms appeared to have important implications on the different performance of treatment perceived for all binders. Considering total chlorides, removal was more significant for OPC and GGBS when compared to others. The main difference noted was that for GGBS the removal of bound chlorides was more significant due to a possible release of adsorbed chlorides from the silicate hydrates, present at higher intensities in this case. However, even though GGBS had greater rates of bound chloride removal it had still the same percentage as OPC for total efficiency due to the fact that in OPC the removal of free chlorides is more expressive.

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Section: Of 19mentioning

confidence: 99%