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August 17, 2025Journal of Physics Conference SeriesOpen Access

Effect of sodium silicate content on shrinkage and mechanical properties of MGO-activated slag

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Authors

JFJiasi FangJSJie Song

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Overview

Experimental analysis reveals sodium silicate enhances compressive strength in alkali-activated slag, suggesting a trade-off in autogenous shrinkage.

Key Points

  • Incorporating sodium silicate enhances compressive strength, yet increases autogenous shrinkage in alkali-activated slag.
  • Alkali-activated slag with MgO shows lower compressive strength due to limited hydration in a weak alkaline environment.
  • MgO assists in reducing autogenous shrinkage by promoting hydrotalcite-like phases during hydration processes.
  • The combination of MgO and sodium silicate offers a compromise between improved mechanical properties and controlled shrinkage.

Cite This Study

Fang et al. (2025) studied this question.

synapsesocial.com/papers/68a36c360a429f7973330633https://doi.org/10.1088/1742-6596/3068/1/012142
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