硅酸盐学报2017，Vol.45Issue(11)：1629-1634,6.DOI:10.14062/j.issn.0454-5648.2017.11.09
2CaSO4·K2SO4复盐对硅酸盐水泥熟料烧成及水化的影响
Effect of 2CaSO4·K2SO4 Double Salt on Sintering Performance and Hydration of Portland Cement Clinker
摘要
Abstract
The2CaSO4?K2SO4 was firstly synthesizedvia high temperature reaction, and then mixed with CaCO3, SiO2, Al2O3 and Fe2O3 as cement raw materials. Those raw materials were sintered at 1450 °C. Influence of 2CaSO4?K2SO4 on the sintering process, mineral composition and polymorphs, and hydration properties of sintered clinker was investigated. The results show that the 2CaSO4?K2SO4 reduces the initial decomposition temperature of CaCO3, improves the melt liquid phase properties of raw materials, increases the content of formed liquid phase and reduces the minimum eutectic temperature of raw materials. The 2CaSO4?K2SO4 increases the content of C3S and reduces the contents of C3A and C4AF in the clinker. The polymorph of C2S in the clinker is mainlyβ-type, and there exists a small amount ofγ-type,the polymorph of C3S is changed from R to M1 in the presence of 2CaSO4?K2SO4, but its polymorphism does not change with the increased content of 2CaSO4?K2SO4. The 2CaSO4?K2SO4reduces the hydration induction period of clinker and increases the maximum value of the second hydration exothermic peak. The initial and late hydration properties of clinker are inhibited due to the 2CaSO4?K2SO4, but the hydration rate of clinker in the medium term is increased.关键词
硫酸钾钙复盐/高温烧成/矿物成分/晶型/水化性能Key words
calcium-langbeinite/high temperature reaction/mineral composition/polymorph/hydration properties分类
化学化工引用本文复制引用
黄黎明,杨正宏,宋文娟,李好新..2CaSO4·K2SO4复盐对硅酸盐水泥熟料烧成及水化的影响[J].硅酸盐学报,2017,45(11):1629-1634,6.基金项目
国家自然科学基金重大项目(51132010). （51132010）
