Kinetics of hydration of 2CaO·SiO₂–xMn₂O₃ system

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• 作者：Parkash ; Ram ; Mehta ; S.K. ; Dixit ; Seema ; Ahluwalia ; S.C. ; Sharma ; J.M.
• 关键词：Thermogravimetric analysis ; Dicalcium silicate ; Hydration ; X-ray diffraction
• 刊名：Thermochimica Acta
• 出版年：2004
• 出版时间：December 15, 2004
• 年：2004
• 卷：424
• 期：1-2
• 页码：37-42
• 全文大小：125 K

文摘

Samples of dicalcium silicate using xMn₂O₃ (x = 0.5–5.0 % by mass of C₂S) were prepared and hydrated with a view to studying the effect of concentration of Mn₂O₃ on the kinetics of hydration of pure and Mn₂O₃ doped phase. Hydrated samples of different age intervals from 3–180 days were investigated by DTA/DTG and X-ray diffraction techniques. Hydration of Mn₂O₃ doped dicalcium silicate phase indicates that the hydration increases with increase in Mn₂O₃ from 0.5 to 0.7 % and then declines to become minimal at 5.0 % Mn₂O₃ concentration. The degree of hydration and extent of hydration uniformly increase at all concentrations, reaching a value of 69 % at 90 days age for pure C₂S and 99 % at 90 days age for 0.7 % Mn₂O₃ dopant. However, only 86 % of hydration is observed for 0.5 % Mn₂O₃ dopant at the above age.