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本文采用程序升温脱附(TPD)技术研究C_3S、β-C_2S、C_3A和C_4AF表面上的水化反应。水在四种单矿物表面上有两种吸附态——分子态和离子态。也即,这些单矿物对水有两类活性中心。对C_3S,在分子态的活性中心上可能生成C—S—H,在离子态的活性中心上可能生成C—H。在C_3A、C_3S、C_4AF和β-C_2S上的相对活性中心数分别为:100,97.7,69.9和2.2。同时得到了脱附活化能。
In this paper, temperature-programmed desorption (TPD) was used to study the hydration reaction of C_3S, β-C_2S, C_3A and C_4AF surfaces. Water has two adsorption states on the four single mineral surfaces - molecular and ionic. That is, these single minerals have two types of active sites on water. For C_3S, C-S-H may be generated in the active center of the molecular state, and C-H may be generated in the active center of the ionic state. The relative activity centers on C_3A, C_3S, C_4AF and β-C_2S were 100, 97.7, 69.9 and 2.2, respectively. At the same time, the desorption activation energy was obtained.