盐耦合侵蚀下碱矿渣水泥相演变的热力学模拟

Translated title of the contribution: Thermodynamic Modelling of Phase Evolution in Alkali‑Activated Slag Cement upon Combined Attack of Salts

Yibing Zuo*, Yishun Liao, Guang Ye

*Corresponding author for this work

Research output: Contribution to journalArticleScientific

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Abstract

Thermodynamic parameters of chloride and sulfate intercalated hydrotalcites were deduced. The phase evolutions in alkali‑activated slag cement upon only sodium chloride or only magnesium sulfate attack and combined attack of those two salts were investigated via thermodynamic modelling. Friedel's salt was predicted to form under sodium chloride attack, while monosulfate, ettringite, gypsum, magnesium silicate hydrate and sulfate intercalated hydrotalcite were predicted to form upon magnesium sulfate attack. The combined attack of sodium chloride and magnesium sulfate exhibited not only characteristics by single attack of those two salts but also coupling effects which promoted the formation of chloride intercalated hydrotalcite and inhibited the formation of Friedel's salt and magnesium silicate hydrate. An increase of the magnesium sulfate proportion led to lower capacity of chemically binding chloride.

Translated title of the contributionThermodynamic Modelling of Phase Evolution in Alkali‑Activated Slag Cement upon Combined Attack of Salts
Original languageChinese
Pages (from-to)7-13
Number of pages7
JournalJianzhu Cailiao Xuebao/Journal of Building Materials
Volume26
Issue number1
DOIs
Publication statusPublished - 2023

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • alkali‑activated slag cement
  • combined attack
  • magnesium sulfate
  • phase evolution
  • sodium chloride
  • thermodynamic modelling

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