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September 27, 2025SustainabilityOpen Access

Sustainable Expansive Agent from FGD Gypsum and CAC Used to Mitigate Shrinkage in Alkali-Activated Mortars and Promoter the Valorization of Industrial By-Products

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Authors

TMThais Marques da Silva MouraJRJanaíde Cavalcante Rocha

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Overview

Experiment assesses FGD gypsum with calcium aluminate cement reducing shrinkage in alkali-activated mortars, suggesting potential for industrial waste valorization.

Key Points

  • CAC-FGD added at 10% reduced drying shrinkage by 23% and autogenous shrinkage by 30%, enhancing performance.
  • Mechanical strength improved by approximately 16% at 28 days with the FGD gypsum addition in alkali-activated mortars.
  • Aluminosilicate gels and ettringite formation contributed to controlled expansion and reduced shrinkage in the mortars.
  • Optimizing the usage of industrial by-products like FGD gypsum presents opportunities for sustainable construction materials.

Cite This Study

Moura et al. (2025) studied this question.

synapsesocial.com/papers/68d7b3e2eebfec0fc5236b32https://doi.org/10.3390/su17198617
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Utilization of Desulfurization Gypsum in Alkali-Activated Mortar: Performance Enhancement and Microstructural Evolution2025
  2. 2Effect of borax-modified activator on mechanical properties and drying shrinkage of alkali-activated slag/metakaolin mortar2024 · 2 citations
  3. 3Comparison of the effects of different expansion agents on alkali-activated rapid repair mortars: workability, mechanical properties, drying shrinkage2026
  4. 4Mechanical and Carbonation Performance of Alkali-Activated Mortars Incorporating GGBS and Recycled Construction Spoil2026
  5. 5Optimization of Compressive Strength and Drying Shrinkage of Calcium-Based Alkali-Activated Mortars Using Expansive and Shrinkage-Reducing Agents2026