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- W3200628549 abstract "To solve the problem of low early strength of the CaO-activated slag system, the influence of adding Al2(SO4)3 as an auxiliary activator on the compressive strength development, hydration products and microstructure of CaO-activated blast furnace slag (BFS) system was investigated in this study. The results showed that adding Al2(SO4)3 enhanced the strength of binders prepared from two slag types (S1 and S2) when the addition of Al2(SO4)3 was no more than 3 wt%, including 3-d strength and 28-d strength; with an increase in Al2(SO4)3 content, the strength enhancement gradually weakened. The strength enhancement of Al2(SO4)3 was attributed to its ability to accelerate the hydration reaction and induce more dissolution of BFS as well as the formation of more ettringite and calcium silicate hydrate gels, which was confirmed by the setting time, hydration heat, X-ray powder diffraction, thermogravimetric analysis and mercury intrusion porosimeter. This study proved that the compressive strength enhancement effect of Al2(SO4)3 on group 1 was weaker than on group 2 due to the difference in chemical oxide composition and the reactivity of the two slag types. Further, the addition of Al2(SO4)3 significantly influenced the pore size distribution of the binders." @default.
- W3200628549 created "2021-09-27" @default.
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- W3200628549 date "2021-11-01" @default.
- W3200628549 modified "2023-09-25" @default.
- W3200628549 title "Influence of aluminum sulfate on strength of CaO-activated slag system" @default.
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- W3200628549 doi "https://doi.org/10.1016/j.conbuildmat.2021.124895" @default.
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