Influence of ligands as chemical admixtures in the early hydration of sodium carbonate-activated blast furnace slag

Ramaswamy, Rajeswari; Illikainen, Mirja; Yliniemi, Juho

doi:10.1016/j.conbuildmat.2024.135753

Construction and Building Materials

2024

DOI: 10.1016/j.conbuildmat.2024.135753

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Influence of ligands as chemical admixtures in the early hydration of sodium carbonate-activated blast furnace slag

Rajeswari Ramaswamy,

Mirja Illikainen,

Juho Yliniemi

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2024

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Cited by 2 publications

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Atomic insights into the interaction mechanism underpinning carbonate ion adsorption in smithsonite flotation

Li,

Zhang,

Shi

2024

Process Safety and Environmental Protection

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Atomic insights into the interaction mechanism underpinning carbonate ion adsorption in smithsonite flotation

Li,

Zhang,

Shi

2024

Process Safety and Environmental Protection

View full text Add to dashboard Cite

Hybrid Organic–Inorganic Blast Furnace Slag Binders Activated with Alkali Acetates

Huang,

Marsh,

Yue

et al. 2024

ACS Omega

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Hybrid organic−inorganic binders based on blast furnace slag were produced using sodium (NaAc) or potassium (KAc) acetate as the sole activator, and their properties were compared with those of sodium-or potassium hydroxide-activated slag pastes. The acetate-activated binders showed significantly lower cumulative heat release and extended setting time (∼230 h) than the hydroxide-activated binders. The main reaction products forming in all binders were calcium aluminosilicate hydrate-type gels and a hydrotalcite-like phase, independently of the activator type used. Compressive strengths of the acetate-activated pastes (∼40 MPa at 180 days) were lower than those of the hydroxide-activated binders (∼80 MPa at 180 days). However, the acetate-based binders exhibited superior impermeability and reduced wettability at 28 days, likely due to hydrophobic acetate groups. It is hypothesized that acetates dissociate in water, forming calcium acetate and alkali silicates via a reaction with species dissolving from the slag. This study demonstrates alkali acetates are effective activators for creating hybrid slag-based binders with reduced permeability.

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Influence of ligands as chemical admixtures in the early hydration of sodium carbonate-activated blast furnace slag

Cited by 2 publications

References 33 publications

Atomic insights into the interaction mechanism underpinning carbonate ion adsorption in smithsonite flotation

Atomic insights into the interaction mechanism underpinning carbonate ion adsorption in smithsonite flotation

Hybrid Organic–Inorganic Blast Furnace Slag Binders Activated with Alkali Acetates

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