Thermodynamic investigation of the CaOAl2O3CaSO4K2OH2O system at 25°C
Thermodynamic investigation of the CaOAl2O3CaSO4K2OH2O system at 25°C
复制标题
25°C 下 CaOAl2O3CaSO4K2OH2O 体系的热力学研究
DOI：
10.1016/0008-8846(93)90180-h
复制
发表时间：
1993
影响因子：
11.4
通讯作者：
F. Glasser
中科院分区：
文献类型：
--
作者：
D. Damidot;F. Glasser
计算了25°C时CaO·Al_2O_3·CaSO_4·K_2O·H_2O体系在几种KOH浓度下的平衡相图。选择这些KOH浓度以与水泥孔隙流体组合物和公开的实验数据相关。除了在CaO → Al_2O_3 → CaSO_4 → H_2O体系中发现的水合物外，还必须考虑到正长岩和K_2SO_4。因此，新的不变点和边界曲线的高钾和硫酸盐浓度的定义。概述了该系统在较高温度（100°C）下的一般特征：在40°C以上，五盐（CaSO 4）5·K2SO 4·H2O）成为稳定相。
An equilibrium phase diagram has been calculated for the CaOAl2O3CaSO4K2OH2O system at 25°C for several KOH concentrations. These KOH concentrations were chosen to relate to cement pore fluid compositions and published experimental data. In addition to the hydrates found in the CaOAl2O3CaSO4H2O system, syngenite and K2SO4have to be taken into account. Thus new invariant points and boundary curves are defined for high potassium and sulphate concentrations. The general features of the system at higher temperatures, to 100°C, are outlined: above 40°C, the pentasalt, (CaSO4)5.K2SO4.H2O, becomes a stable phase.