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Chloride-related phenomena in limestone cement materials: effect of mineral admixtures and sulfates
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SYSNO ASEP 0505716 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Chloride-related phenomena in limestone cement materials: effect of mineral admixtures and sulfates 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 Source Title ACI Materials Journal - ISSN 0889-325X
Roč. 116, č. 6 (2019), s. 19-30Number of pages 12 s. Publication form Print - P Language eng - English Country US - United States Keywords chloride diffusion ; low temperature ; mineral admixtures ; portland-limestone cement ; reinforcement corrosion ; sulfates Subject RIV JN - Civil Engineering OECD category Materials engineering Method of publishing Limited access Institutional support UTAM-F - RVO:68378297 UT WOS 000500743500002 EID SCOPUS 85076237279 DOI 10.14359/51716820 Annotation The development of environmentally friendly cementitious materials, efficient in preventing chloride ingress and decreasing reinforcement corrosion risk, is significantly important for structural applications exposed to corrosive conditions. This paper investigates the effect of natural pozzolana, fly ash, blast-furnace slag, and metakaolin on the behavior of portland-limestone cement concretes and mortars during storage in chloride-sulfate and chloride solutions at 5°C (41°F). Acid- and water-soluble chloride contents, and apparent chloride diffusion coefficients, were determined in concretes. Reinforcement corrosion half-cell potential and current density, mass loss of steel reinforcing bars, and carbonation depth were monitored in mortars. The employment of mineral admixtures decreased chloride ingress and reinforcement corrosion during specimens’ exposure to chloride solution, however, the presence of sulfates in the corrosive environment prevented their improving effect. Mineral admixtures increased chloride binding and the resistance of concrete against chloride diffusion, while they also showed similar efficiency in preventing reinforcement corrosion. Sulfates facilitated chloride ingress, hindered chloride binding, and promoted reinforcement corrosion. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2020 Electronic address https://www.concrete.org/publications/internationalconcreteabstractsportal.aspx?m=details&ID=51716820
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