This paper reports the experiments of chemi-cal and physical activation of γ-C2S and their results. Chemi-cal activation is that the addition of active substances to γ-C2S can promote its 3 days hydrated ratio to 20...This paper reports the experiments of chemi-cal and physical activation of γ-C2S and their results. Chemi-cal activation is that the addition of active substances to γ-C2S can promote its 3 days hydrated ratio to 20% and 7 days to 26 γ31% . Physical activation,on the other hand,by irradiat-ing γ-C2S with energetic ray ,can promote its 3 dsays hydrat-ed ratio to 29%. Our experiments illustrate the mechanisms of γ- C2S chemical activation and physical activation. The for-mer is the formation of the insoluble by combination of the added active substances with Ca (OH)2,which is dissolved from γ-C2S ,breaks the γ-C2S dissolving-precipitating equilib-rium and promotes its hydration process. As a result, CSH hydrate is formed more rapidly. The latter is that the elastic collision between the enegetic particles, which enter the ?-C2S, and cause some atoms in lattice to deviate from their normal positions and become interstitial atoms,and forms vacancy de-fects simultaneously. As crystal defect density increases > free energy increases, C2S hydration activity is improved.展开更多
文摘This paper reports the experiments of chemi-cal and physical activation of γ-C2S and their results. Chemi-cal activation is that the addition of active substances to γ-C2S can promote its 3 days hydrated ratio to 20% and 7 days to 26 γ31% . Physical activation,on the other hand,by irradiat-ing γ-C2S with energetic ray ,can promote its 3 dsays hydrat-ed ratio to 29%. Our experiments illustrate the mechanisms of γ- C2S chemical activation and physical activation. The for-mer is the formation of the insoluble by combination of the added active substances with Ca (OH)2,which is dissolved from γ-C2S ,breaks the γ-C2S dissolving-precipitating equilib-rium and promotes its hydration process. As a result, CSH hydrate is formed more rapidly. The latter is that the elastic collision between the enegetic particles, which enter the ?-C2S, and cause some atoms in lattice to deviate from their normal positions and become interstitial atoms,and forms vacancy de-fects simultaneously. As crystal defect density increases > free energy increases, C2S hydration activity is improved.
