摘要
研究了掺杂Ｃｒ２Ｏ３，ＭｇＯ对Ｃ４Ａ３Ｓ矿物形成及水化性能的影响．结果表明，在１３００℃保温１ｈ的煅烧条件下，掺加一定量的ＭｇＯ能促进Ｃ４Ａ３Ｓ的形成，而Ｃｒ２Ｏ３则有稳定过渡产物ＣＡ的作用，从而减慢Ｃ４Ａ３Ｓ的形成速度；在１３００℃保温３ｈ的煅烧条件下，掺加Ｃｒ２Ｏ３，ＭｇＯ均能使Ｃ４Ａ３Ｓ的形成量增加．掺杂使Ｃ４Ａ３Ｓ晶体主要以四方晶系的结构形式存在．在本实验条件下，掺杂可提高Ｃ４Ａ３Ｓ的水化反应活性，其原因归结为晶体结构的畸变．
The influence of Cr 2O 3 or MgO on the formation and hydration properties of C 4A 3S is studied in this paper. Results show that, adding a suitable amount of MgO can promote the formation of C 4A 3S, but Cr 2O 3 has the effect of stabilization of the transitional product CA and decreases the formation speed of C 4A 3S at 1 300 ℃ for 1 h; when soaking time is increased to 3 h, adding Cr 2O 3 or MgO can both increase the mass fraction of C 4A 3S in formation. The impure oxides are the cause of the existence of crystals of C 4A 3S in tetragonal structure. Under the experimental conditions, adding Cr 2O 3 or MgO can both increase the hydration activity of C 4A 3S, attributed to distortion in the crystal lattice of C 4A 3S.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1998年第6期702-707,共6页
Journal of The Chinese Ceramic Society
关键词
氧化铬
氧化镁
硫铝酸钙
矿物形成
水化活性
chromic oxide, magnesia, calcium sulphoaluminate, mineral formation, hydration activity
