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March 3, 2026Open Access

An Innovative High-Content Steel Slag Alkali-Sulfate Composite Activated Binder: Hydration Behavior and Application

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Authors

ZLZehai LiJYJun YaoSHShaoguang Hua

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Overview

Develops an innovative binder using high-content steel slag, improving strength and heavy metal immobilization for sustainable applications.

Key Points

  • To investigate the hydration behavior and mechanical properties of a high-content steel slag alkali-sulfate activated binder.
  • Developed an alkali-sulfate activation method for steel slag-based binder preparation.
  • Systematically varied alkali activator dosage, modulus, and the contents of steel slag and flue gas desulfurization gypsum.
  • Conducted mechanical property tests and microstructural characterization of the resulting binder.
  • Assessed the binder's effectiveness in solidifying lead-zinc tailings for environmental applications.
  • Achieved a 28-day compressive strength of 12.85 MPa with a mix of 60% steel slag, 30% fly ash, and 10% desulfurization gypsum.
  • Demonstrated excellent volume stability in the binder.
  • Showed effective immobilization of heavy metals (Pb, As, Cd, Zn) with leaching concentrations meeting environmental standards and immobilization efficiencies greater than 80%.
  • Identified C-A-S-H and ettringite as main hydration products contributing to a dense microstructure.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/69a67f12f353c071a6f0ae22https://doi.org/10.3390/ma19050936
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Also Consider

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

  1. 1Mechanochemical activation of steelmaking slag to obtain a cementless composite binder2024
  2. 2Mechanical Performance Optimization and Microstructural Mechanism Study of Alkali-Activated Steel Slag–Slag Cementitious Materials2024 · 31 citations
  3. 3Effects of Steel Slag on the Hydration Process of Solid Waste-Based Cementitious Materials2024 · 29 citations
  4. 4Hydration behavior, silicate polymerization and mechanical performance of granulated blast furnace slag-desulfurization gypsum binders under different activation systems2026
  5. 5Analysis of Hydration Mechanism of Steel Slag-Based Cementitious Materials under Saline–Alkaline-Coupled Excitation2024 · 15 citations