Studies on clinker calcium silicates bearing CaF2 and CaSO4
Studies on clinker calcium silicates bearing CaF2 and CaSO4
复制标题
DOI：
10.1016/0008-8846(79)90121-2
复制
发表时间：
1979-05
影响因子：
11.4
通讯作者：
C. Gilioli;F. Massazza;M. Pezzuoli
中科院分区：
文献类型：
--
作者：
C. Gilioli;F. Massazza;M. Pezzuoli
在1000°C和1150°C下研究了CaO <$C2S <$CaSO4 <$CaF2体系。由于在上述温度下许多样品中存在液相，因此仅部分地确定了固态平衡关系。该系统仅含有四元化合物：粉硅铝石3C2S.3CaSO4.CaF2。实验结果表明，只有在Fwt%/SO_3 wt %> 0.158的水泥生料中才能形成2C_2S.CaF_2和3C_3S.CaF_2两种硅氟化物。因此，熟料烧成过程中通常关注的中间化合物是氟弹性沸石和硅硫酸钙（2C2S.CaSO 4）。也通过微探针进行的分析测定表明，“3C3S.CaF2”的组成更好地对应于式19CaO.7SiO2.2CaF2。
The system CaOC2SCaSO4CaF2was studied at temperatures of 1000°C and 1150°C. The solid state equilibrium relations were determined only partially since liquid phase was present in many samples at the aforesaid temperatures. The system contains only a quaternary compound: the flour-ellestadite 3C2S.3CaSO4.CaF2. The tests carried out lead the authors to think that the two silico-fluorides 2C2S.CaF2and 3C3S.CaF2can form only in the cement raw meals with Fwt%/SO3wt% ratio > 0.158. Therefore the intermediate compounds which can generally interest the firing process of clinker are the fluor-ellestadite and the calcium silico-sulphate (2C2S.CaSO4). Analytical determinations carried out also by microprobe showed that the composition of “3C3S.CaF2” better corresponds to the formula 19CaO.7SiO2.2CaF2.