硅酸盐学报2017，Vol.45Issue(2)：242-248,7.DOI:10.14062/j.issn.0454-5648.2017.02.10
低温养护下硫铝酸盐水泥的水化进程及强度发展
Hydration Characteristics and Strength Development of Sulphoaluminate Cement Cured at Low Temperature
摘要
Abstract
The hydrate assemblage, hydration degree and compressive strength development of calcium sulphoaluminate cement pastes cured at 0, 5℃ and 20℃ were investigated. The results indicate that the hydration process is significantly delayed by the low temperature (0℃ and 5℃) curing, decreasing the degree of hydration in the early ages. Meanwhile, formation of gypsum is detected. However, the hydration degree increases significantly during 2–3 d, along with the completely consumption of gypsum. Neither the rapid hydration process is hindered nor the hydration products are changed by low temperature curing, but the amount of hydrates is affected. Compressive strength development is basically the same with the hydration degree evolution. The compressive strength at 1 d decreases sharply at 0℃ and 5℃, but increase significantly in the later ages. The 28 d compressive strength of pastes curing at 5℃ even exceed that at 20℃. It is revealed that the development of compressive strength mainly depends on the hydration rate and degree of cement paste in the early ages, while the growth of it in the later ages more depends on the quantitative change of main hydration products and the evolution of microstructure.关键词
硫铝酸盐水泥/低温养护/水化程度/抗压强度/水化产物/微观结构Key words
sulphoaluminate cement/low temperature curing/hydration degree/compressive strength/hydration product/microstructure分类
化学化工引用本文复制引用
王培铭,李楠,徐玲琳,张国防..低温养护下硫铝酸盐水泥的水化进程及强度发展[J].硅酸盐学报,2017,45(2):242-248,7.基金项目
国家自然科学基金(51402216，51572196)；高性能土木工程材料国家重点实验室开放基金；同济大学大型仪器设备开放测试基金(0002015037)资助项目。 （51402216，51572196）
