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Ladle furnace slag as a partial replacement of Portland cement
Highlights LFS particle size and accelerated curing has an effect on volumetric instability. LFS-cement systems hydration proceeds similarly to ordinary Portland cement. In absence of free CaO the phase that leads to instability problems is free MgO. Partial cement replacement by LFS (25wt%) has limited mechanical negative effects. Physical-mechanical-microstructural properties were analyzed in LFS-cement systems.
Abstract Ladle furnace slag (LFS) has been proposed as partial cement replacement due to its similar chemical composition with Portland cement. However, its mineralogical composition needs to be considered due to problems with expansive reactions and lower cementing activity. The objective of this study is to investigate the effect of particle size and mineralogical composition of LFS in cement-slag systems. The obtained results show a correlation between microstructural changes and macroscopic properties, lower mechanical performance and volumetric instability problems, although within the established limits in normal curing conditions. Therefore, it is concluded that LFS presents an interesting potential as cement replacement.
Ladle furnace slag as a partial replacement of Portland cement
Highlights LFS particle size and accelerated curing has an effect on volumetric instability. LFS-cement systems hydration proceeds similarly to ordinary Portland cement. In absence of free CaO the phase that leads to instability problems is free MgO. Partial cement replacement by LFS (25wt%) has limited mechanical negative effects. Physical-mechanical-microstructural properties were analyzed in LFS-cement systems.
Abstract Ladle furnace slag (LFS) has been proposed as partial cement replacement due to its similar chemical composition with Portland cement. However, its mineralogical composition needs to be considered due to problems with expansive reactions and lower cementing activity. The objective of this study is to investigate the effect of particle size and mineralogical composition of LFS in cement-slag systems. The obtained results show a correlation between microstructural changes and macroscopic properties, lower mechanical performance and volumetric instability problems, although within the established limits in normal curing conditions. Therefore, it is concluded that LFS presents an interesting potential as cement replacement.
Ladle furnace slag as a partial replacement of Portland cement
Araos Henríquez, Paulo (author) / Aponte, Diego (author) / Ibáñez-Insa, Jordi (author) / Barra Bizinotto, Marilda (author)
2021-03-16
Article (Journal)
Electronic Resource
English
Portland cement and blast furnace slag
| Engineering Index Backfile | 1903
| British Library Online Contents | 2015