Hydration heat and kinetics of composite binder containing blast furnace ferronickel slag at different temperatures

被引：22

作者：

Han, Fanghui ^{[1
]}

Zhang, Hongbo ^{[1
]}

Pu, Shaochang ^{[1
]}

Zhang, Zengqi ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing Key Lab Urban Underground Space Engn, Beijing, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing, Peoples R China

来源：

THERMOCHIMICA ACTA | 2021年 / 702卷

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

Blast furnace ferronickel slag; Hydration heat; Hydration kinetics; Temperature; MAGNESIUM NICKEL SLAG; BLENDED CEMENT; COMPRESSIVE STRENGTH; PORTLAND-CEMENT; FINE AGGREGATE; FLY-ASH; GEOPOLYMER; MECHANISM; EVOLUTION;

D O I：

10.1016/j.tca.2021.178985

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The hydration heat of composite binder containing up to 70 % blast furnace ferronickel slag (BFFS) was determined at 25 degrees C, 45 degrees C and 60 degrees C. The hydration kinetics process and parameters were simulated and analysed. BFFS shows pozzolanic activity in a strong alkaline solution. Increasing the BFFS content retards hydration and reduces the exothermic rate. The high temperature dramatically promotes hydration, especially for the composite binder containing no more than 30 % BFFS. The hydration kinetics process involves nucleation and crystal growth (NG) -> interactions at phase boundaries (I) -> diffusion (D) at 25 degrees C and 45 degrees C. However, this process becomes NG -> D at 60 degrees C. The addition of BFFS decreases the overall hydration rate. BFFS has a smaller effect on the overall hydration of the composite binder than ground granulated blast furnace slag, but has a greater effect than fly ash.

引用

页数：12

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