The reaction between Ca2+ from steel slag and granulated blast-furnace slag system: a unique perspective

Wang, Mengqi; Qian, Binbin; Jiang, Jun; Liu, Huachen; Cai, Qiang; Ma, Bing; Hu, Yueyang; Wang, Luming

doi:10.1007/s11696-020-01248-5

Cited by 7 publications

(2 citation statements)

References 52 publications

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“…However, if the content of cement is too high, it can actually decrease the strength of the system. This is because when there is an excess amount of cement, the concentration of Ca 2+ in the early solution quickly reaches saturation, making it difficult for it to react with GBFS in a timely manner, impeding the dissolution of calcium aluminate and calcium silicate in steel slag [75][76][77].…”

Section: Hardened Properties Of Sgm 41 Mechanical Strengthmentioning

confidence: 99%

Feasibility of Preparing Steel Slag–Ground Granulated Blast Furnace Slag Cementitious Materials: Synergistic Hydration, Fresh, and Hardened Properties

Sun,

Hou,

Guo

et al. 2024

Buildings

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Steel slag and GBFS are wastes generated during the steel and iron smelting process, characterized by their considerable production rates and extensive storage capacities. After grinding, they are often used as supplementary cementitious materials. However, the intrinsic slow hydration kinetics of steel slag–GBFS cementitious material (SGM) when exposed to a pure water environment result in prolonged setting times and diminished early-age strength development. The incorporation of modifiers such as gypsum, clinker, or alkaline activators can effectively improve the various properties of SGM. This comprehensive review delves into existing research on the utilization of SGM, examining their hydration mechanisms, workability, setting time, mechanical strengths, durability, and shrinkage. Critical parameters including the performance of base materials (water-to-cement ratio, fineness, and composition) and modifiers (type, alkali content, and dosage) are scrutinized to understand their effects on the final properties of the cementitious materials. The improvement mechanisms of various modifiers on properties are discussed. This promotes resource utilization of industrial solid wastes and provides theoretical support for the engineering application of SGM.

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Section: Hardened Properties Of Sgm 41 Mechanical Strengthmentioning

confidence: 99%

Feasibility of Preparing Steel Slag–Ground Granulated Blast Furnace Slag Cementitious Materials: Synergistic Hydration, Fresh, and Hardened Properties

Sun,

Hou,

Guo

et al. 2024

Buildings

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show abstract

“…However, the use of SSL in large amounts will cause the development of strength to be unsatisfactory, which limits its further utilization. Previous investigations have demonstrated that calcium hydroxide positively impacts the development of strength and the formation of a denser microstructure in geopolymer binders due to accelerated geopolymerization and the generation of a complex calcium-containing geopolymer [32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

The Performance and Reaction Mechanism of Untreated Steel Slag Used as a Microexpanding Agent in Fly Ash-Based Geopolymers

Zang,

Yao,

et al. 2024

Buildings

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Steel slag is an industrial by-product of the steelmaking process, which is under-utilized and of low value due to its characteristics. Alkali-activated technology offers the possibility of high utilization and increased value of steel slag. A geopolymer composition was composed of steel slag, fly ash, and calcium hydroxide. Four experimental groups utilizing steel slag to substitute fly ash are established based on varying replacement levels: 35%, 40%, 45%, and 50% by mass. The final samples were characterized by compressive strength tests, and Fourier-transform infrared spectroscopy measurements, thermogravimetric measurements, scanning electron microscopy with energy dispersive spectroscopy, X-ray diffraction, and mercury intrusion porosimetry were used to investigate the chemical composition and microstructure of the final products. Higher steel slag/fly ash ratios lead to a lower bulk density and lower compressive strength. The compressive strength ranges from 3.7 MPa to 5.6 MPa, and the bulk density ranges from 0.85 g/cm3 to 1.13 g/cm3. Microstructural and energy-dispersive X-ray spectroscopy analyses show that the final geopolymer products were a type of composite consisting of both calcium aluminate silicate hydrate and sodium aluminate silicate hydrate, with the unreacted crystalline phases acting as fillers.

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Development of sustainable foamed alkali-activated materials for modular construction

Camargos,

Dias,

da Silva

et al. 2023

J Braz. Soc. Mech. Sci. Eng.

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The reaction between Ca2+ from steel slag and granulated blast-furnace slag system: a unique perspective

Cited by 7 publications

References 52 publications

Feasibility of Preparing Steel Slag–Ground Granulated Blast Furnace Slag Cementitious Materials: Synergistic Hydration, Fresh, and Hardened Properties

Feasibility of Preparing Steel Slag–Ground Granulated Blast Furnace Slag Cementitious Materials: Synergistic Hydration, Fresh, and Hardened Properties

The Performance and Reaction Mechanism of Untreated Steel Slag Used as a Microexpanding Agent in Fly Ash-Based Geopolymers

Development of sustainable foamed alkali-activated materials for modular construction

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