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用程序升温脱附(TPD)技术研究了水在C_3S、C_2S、C_3A和C_4AF表面上的水化反应。从TPD图谱中可以看到:C_3A上只有一个脱附峰,其脱附峰最高温度(T_M)为440.0℃,脱附活化能(E_d)为28.308 kcal/mol;C_2S上也只有一个脱附峰,其T_M为294.9℃,E_d为18.006 kcal/mol;C_3S上有两个脱附峰,其T_M分别为407.1℃和441.2℃,E_d相应为25.026 kcal/mol和28.368 kcal/mol;C_4AF上也有两个脱附峰,其T_M分别为269.0℃和447.1℃,E_d相应为19.457 kcal/mol和29.680kcal/mol。
The temperature-programmed desorption (TPD) technique was used to study the hydration of water on the surfaces of C_3S, C_2S, C_3A and C_4AF. From the TPD spectra, we can see that there is only one desorption peak on C_3A, the maximum peak temperature of desorption peak (T_M) is 440.0 ° C, the desorption activation energy (E_d) is 28.308 kcal / mol, and there is only one desorption peak , T_M is 294.9 ℃ and E_d is 18.006 kcal / mol. There are two desorption peaks on C_3S with T_M of 407.1 ° C and 441.2 ° C, respectively, with E_d of 25.026 kcal / mol and 28.368 kcal / mol respectively. There are also two A desorption peak, the T_M were 269.0 ℃ and 447.1 ℃, respectively, E_d 19.457 kcal / mol and 29.680 kcal / mol.