Abstract: Aiming to address the low hydration activity of steel slag, thiswork investigated the influence of three typical ethylenediamine derivatives (THEED, EDTA, and EDTMPA) on the mechanical property, hydration product composition, and microstructure of steel slag paste, almost its hydration mechanism. The results indicate that, compared to EDTA and EDTMPA, THEED significantly enhances the compressive strength of the steel slag hardened paste, and the 3 d and 28 d compressive strength growth rates were 7.33 times and 5.45 times, respectively. In addition to promoting the dissolution-hydration of silicoaluminate minerals in the steel slag paste, the unique hydroxyl group of THEED also demonstrates a significant effect on the dissolution of iron phases. The steel slag paste forms typical cluster-like AFm solid solution phases (monocarboaluminate hydrate, C4(A, F)ĈH11) under the influence of THEED, which combine other hydrated products such as C-S-H significantly reduces the number and size of large pores in the hardened paste, leading to densification of the microstructure and a notable improvement in mechanical properties.
岳德钰, 张大江, 王剑锋, 霍鹏臣, 刘晓, 刘辉, 常磊, 贺定勇, 崔素萍. 乙二胺衍生物对钢渣水化硬化特性的影响[J]. 材料导报, 2025, 39(11): 24020062-8.
YUE Deyu, ZHANG Dajiang, WANG Jianfeng, HUO Pengchen, LIU Xiao, LIU Hui, CHANG Lei, HE Dingyong, CUI Suping. Effect of Ethylenediamine Derivatives on Hydration and Hardening Properties of Steel Slag. Materials Reports, 2025, 39(11): 24020062-8.
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2025, Vol. 39 
