贝利特的机械力化学活化

THE MECHANOCHEMICAL ACTIVATION OF BELITE

将１３５０℃下合成的贝利特置于振动磨中粉磨１～７０ｈ后，研究了贝利特在粉磨过程中所发生的机械力化学变化，如粒度分布、晶体结构、晶格应变、粉体表面特性及早期水化活性等。结果表明，粉磨作用可降低贝利特粉体粒度，并使贝利特晶胞参数发生变化；同时使贝利特晶体结晶度下降，贝利特晶格应变及早期水化活性增加，大大提高了贝利特浆体强度；随着粉磨时间延长，贝利特表面伦敦色散分量及极性分量不断提高。当粉磨时间超过３０ｈ时，贝利特表面能反而降低，并使贝利特粉体粒度增大。

Belite synthesised at 1 350 ℃ was ground in a vibration mill for 1-70h. The variations of mechanochemical properties of the samples,such as particle size distribution,crystal structure, lattice strain,surface characteristic and early hydration activity,were studied. The results show that the grinding would cause the particle size to decrease and lead the crystal unit cell dimension of belite to change and the crystallinity to descend. Meanwhile,both the lattice strain and the early hydration activity of bel...