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Influence of sulfates on chloride diffusion and chloride-induced reinforcement corrosion in limestone cement materials at low temperature
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SYSNO ASEP 0475258 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Influence of sulfates on chloride diffusion and chloride-induced reinforcement corrosion in limestone cement materials at low temperature Author(s) Sotiriadis, Konstantinos (UTAM-F) RID, ORCID, SAI
Rakanta, E. (GR)
Mitzithra, M. E. (GB)
Batis, G. (GR)
Tsivilis, S. (GR)Number of authors 5 Article number 04017060 Source Title Journal of Materials in Civil Engineering. - : American Society of Civil Engineers - ISSN 0899-1561
Roč. 29, č. 8 (2017)Number of pages 12 s. Publication form Print - P Language eng - English Country US - United States Keywords limestone cement ; chloride diffusion ; reinforcement corrosion ; sulfate attack ; low temperature Subject RIV JN - Civil Engineering OECD category Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics R&D Projects LO1219 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access UT WOS 000400522100011 EID SCOPUS 85018991022 DOI 10.1061/(ASCE)MT.1943-5533.0001895 Annotation An ordinary portland cement and two portland limestone cements [15 and 35% weight-to-weight ratio (w/w) limestone content] were used for concrete and reinforced mortar specimens preparation. The specimens were exposed to two corrosive solutions (chloride sulfate and chloride) at 5°C. Total (acid-soluble) and free (water-soluble) chloride contents, and apparent chloride diffusion coefficients, were determined in concrete specimens. Reinforcement corrosion half-potential and current density, mass loss of steel rebars, and carbonation depth were measured in mortar specimens. Limestone cements showed very good behavior, although the environments were very corrosive.Total and free chloride ions concentration increased with exposure time and limestone content. Limestone cements showed less capability of binding chlorides than pure portland cement. The cement with low limestone content was the most effective in preventing reinforcement corrosion during mortar exposure to the combined chloride-sulfate solution, although it allowed the most intensive corrosion in the case of the chloride-bearing solution. The presence of sulfates led to higher chloride ion concentrations, less chloride binding and, generally, higher values of chloride diffusion coefficient, and also promoted reinforcement corrosion to a greater extent. Low temperature conditions retained a relatively low corrosion rate. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2018 Electronic address https://doi.org/10.1061/(ASCE)MT.1943-5533.0001895
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