Effect of distortion degree on the hydration of red mud base cementitious material

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2009,（1）
• 页码范围: 88-93
• 页数: 6页
• 语种: 英文
• DOI: 10.1007s12404-009-0118-5

摘要

The interaction of Si anions with AI sites during the hydration process was ob-served by NMR,IR and SEM to understand the reaction mechanism of the hydrates for-mation mixed with oil shale calcined at different temperatures.As the reaction progressed,the coordination of AI (Ⅳ,Ⅴ,and Ⅵ) changed almost completely to Ⅳ,when mixed with oil shale calcined at 700 ℃.However,when mixed with oil shale calcined at 400℃,some 6-coordination of AI still remained in the hydrates.Under the function of alkaline solutions,which were produced with the hydration of clinker,a certain amount of Si and AI atoms dissolved or hydrolyzed from aluminosilicate,formed geomonomers in solutions,and then polycondensed to form networks.