Effect of sodium phosphate and sodium nitrate on microstructure of alkali-activated slag cement pastes and properties of reinforced concrete under cyclic drying-wetting in sea water

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dc.contributor.authorKrivenko P.
dc.contributor.authorRudenko I.
dc.contributor.authorKonstantynovskyi O.
dc.contributor.authorBoiko O.
dc.contributor.authorVaičiukynienė D.
dc.date.accessioned2024-02-09T11:09:47Z
dc.date.available2024-02-09T11:09:47Z
dc.date.issued2023
dc.description.abstractThe relevance of alkali activated slag cement (AASC) concretes for marine structures is due to their enhanced resistance to sea water. However, cyclic influence of sea water and drying under the action of atmospheric carbonic gas in actual operating conditions cause risks of both deterioration of concrete and corrosion of steel reinforcement. These risks increase in case of fresh concretes with high consistency. Application of salts of strong acids, i.e. sodium phosphate and sodium nitrate, in combination with complex multifunctional additive «portland cement - alumina cement - clinoptilolite» was proposed to protect plasticized AASC concrete from the influence of cyclic drying-wetting in sea water with combination of exposure classes XC4 and XS3. It was shown the advanced crystallization of AASC microstructure due to the mentioned salts as admixtures. Corrosion resistance potential of AASC concrete can be improved due to application of specified salts in combination with the mentioned complex additive as factor of aggressive ions (Cl-, SO42- and CO32-) binding. The modified in proposed way plasticized AASC concrete was characterized by the advanced performances, i.e. pore structure, structural density, strength, corrosion resistance, state of steel reinforcement after 90 cycles of wetting/drying in sea water.
dc.description.sponsorshipAuthors would like to acknowledge the contribution the Research Council of Lithuania and the Ministry of Education and Science of Ukraine project ‘‘Solutions to reduce aggressive ions SO42- and Cl- during transport in Portland cement concrete with steel reinforcement in hydraulic structures”, project code S-LU-22-7. The authors also express their gratitude to the Ministry of Education and Science of Ukraine for financial support of this research that is carried out within the budgetary financing of topic with registration No 1020U001010 and implementation period 2020 - 2022.
dc.identifier.citationEffect of sodium phosphate and sodium nitrate on microstructure of alkali-activated slag cement pastes and properties of reinforced concrete under cyclic drying-wetting in sea water / P. Krivenko, I. Rudenko, O. Konstantynovskyi, O. Boiko, D. Vaičiukynienė // AIP Conference Proceedings: IX International Conference on Actual Problems of Engineering Mechanics. – 2023. - Vol. 2840. - P. 020006-1 - 020006-11. - Bibliogr. : 49 titl.
dc.identifier.doi10.1063/5.0168007
dc.identifier.issn0094-243X
dc.identifier.urihttps://repositary.knuba.edu.ua/handle/123456789/11984
dc.language.isoen
dc.publisherAIP Publishing
dc.relation.ispartofIX INTERNATIONAL CONFERENCE ON ACTUAL PROBLEMS OF ENGINEERING MECHANICS (APEM2022)
dc.relation.ispartofAIP Conference Proceedings
dc.relation.ispartofseries2840; 020006
dc.subjectalkali-activated slag cement
dc.subjectreinforced concrete
dc.subjectcyclic drying-wetting
dc.subjectsea water
dc.subjectsodium phosphate
dc.subjectsodium nitrate
dc.subjectкафедра технології будівельних конструкцій і виробів
dc.subject.udc661.6:666.9
dc.titleEffect of sodium phosphate and sodium nitrate on microstructure of alkali-activated slag cement pastes and properties of reinforced concrete under cyclic drying-wetting in sea water
dc.typeArticle

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