当前位置: X-MOL 学术Cem. Concr. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effects of Triethanolamine-Gallate on the workability, hydration and microstructure of steel slag supplementary cementitious materials
Cement and Concrete Research ( IF 10.9 ) Pub Date : 2025-01-28 , DOI: 10.1016/j.cemconres.2025.107810
Bin Zeng, Xumin Zhuang, Shaojie Jia, Wenjin Han, Jingkui Zhong, Liwu Mo, Toshiharu Kishi

Widely used hydration promoters primarily improve the early strength of steel slag supplementary cementitious materials (SCMs) but offer limited enhancement to later strength and fail to mitigate early hydration inhibition by steel slag (SS). This study introduces a novel organic hydration promoter, Triethanolamine-Gallate (TG), synthesized by modifying gallic acid with triethanolamine. TG imparted hydrophobicity to the SS composite cement powder, enhanced fluidity and increased initial and final setting times, and moderated hydration rate but improved overall hydration efficiency of SS composite cement. At 28d, the compressive strength of PS-TG-0.05% (PS was 70% PC and 30% SS) mortar was 21.1% and 13.3% higher than that of PS-Control and PS-TEA-0.05% mortar, respectively. TG promoted the transformation of C3S, C2S, C4AF, Ca2FexAl2-xO5 and CaCO3 into more C-S-H and Mc (monocarboaluminate), especially the new iron-containing Mc. TG also significantly refined the pores and reduced the cumulative pore volume of the SS composite cement.

中文翻译:


三乙醇胺-没食子酸酯对钢渣辅助胶凝材料和加工性、水化及组织的影响



广泛使用的水化促进剂主要提高钢渣辅助胶凝材料 (SCM) 的早期强度,但对后期强度的增强有限,并且无法减轻钢渣 (SS) 的早期水化抑制。本研究介绍了一种新型有机水合促进剂三乙醇胺-没食子酸酯 (TG),它是通过用三乙醇胺修饰没食子酸合成的。TG 赋予 SS 复合水泥粉疏水性,增强流动性并增加初始和最终凝固时间,缓和水化速率,但提高 SS 复合水泥的整体水化效率。28 d时,PS-TG-0.05%(PS为70% PC和30% SS)砂浆的抗压强度分别比PS-Control和PS-TEA-0.05%砂浆高21.1%和13.3%。TG促进了C3S、C2S、C4AF、Ca2FexAl2-xO5和CaCO3转化为更多的C-S-H和Mc(一铝酸盐),特别是新的含铁Mc。TG还显著细化了SS复合水泥的孔隙,降低了累积孔隙体积。
更新日期:2025-01-28
down
wechat
bug