Lattice Boltzmann simulation of the dissolution of slag in alkaline solution using real-shape particles

Yibing Zuo, Guang Ye

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

A dissolution numerical model was proposed in this study to capture the real dissolution kinetics of slag in alkaline solution. It consists of three modules, i.e. (i) simulation of the initial particle parking structure of slag in alkaline solution using real-shape particles of slag, (ii) simulation of the chemical reactions between slag and solution based on the transition state theory, and (iii) simulation of the physical transport of aqueous ions using the lattice Boltzmann method. This dissolution numerical model was verified using experimental results, showing reasonable accuracy. After verification, the dissolution numerical model was implemented to study the influences of temperature and particle shape using a proper recipe of slag in alkaline solution. This recipe was designed to avoid solid phase precipitation or gel formation via thermodynamic analysis. The simulation results showed faster dissolution kinetics of slag when using higher temperatures and more irregular particle shapes.

Original languageEnglish
Article number106313
Pages (from-to)1-16
Number of pages16
JournalCement and Concrete Research
Volume140
DOIs
Publication statusPublished - 2021

Keywords

  • Lattice Boltzmann method
  • Numerical model
  • Real-shape particles
  • Slag dissolution
  • Thermodynamics

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