Reactivity of air granulated basic oxygen furnace steel slag and its immobilization of heavy metals

被引：0

作者：

Ahmed, Muhammad Jawad ^{[1
]}

Schollbach, Katrin ^{[1
]}

van der Laan, Sieger ^{[1
,2
]}

Brouwers, H. J. H. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Dept Built Environm, Eindhoven, Netherlands

[2] Tata Steel RD&T, Ceram Res Ctr, POB 10000, NL-1970 CA Ijmuiden, Netherlands

来源：

JOURNAL OF BUILDING ENGINEERING | 2024年 / 91卷

关键词：

Hydration products; Air granulation; Hydration degree; Immobilization of heavy metals; HYDRATION KINETICS; CEMENT; CHROMIUM; RECOVERY; BEHAVIOR; SULFATE; TESTS; PHASE; CR;

D O I：

10.1016/j.jobe.2024.109704

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Air granulation of basic Oxygen furnace slag can improve its hydraulic potential to enhance recycling potential. The hydration behaviour of the slag has been investigated via isothermal calorimetry, QXRD, and TG/DTG analysis. The air granulated slag exhibited improved early-age hydration and led to the formation of C-S-H, hydrogarnet, and hydrotalcite phases. The slag reactivity is controlled by the dissolution of SiO2 and Fe2O3 bearing phases as observed by SEMEDX-based PARC analysis and the hydration degree reaches up to 41% after 28 days curing. The hydrated slag features an improved immobilization of V and Cr as confirmed by ICP-OES analysis.

引用

页数：10

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