期刊
CEMENT AND CONCRETE RESEARCH
卷 129, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2020.105978
关键词
Acceleration; Hydration; Calcium-silicate-hydrate (C-S-H); Temperature; Oil well cement
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
C-S-H seeds have potential application as accelerators in oil well cementing pastes. Typical oil well conditions present elevated temperatures; nevertheless, is not clear how such temperatures affect the nucleation process induced by these seeds. In this work, class G cement pastes were blended with up to 5.0% of C-S-H seeds and cured at 25, 40 and 60 degrees C. Hydration kinetics results showed that the nucleation effect from C-S-H seeds accelerated the reaction by decreasing the apparent activation energy of pastes. This acceleration was more effective at lower temperatures. Nano-mechanical results showed that the main phases obtained from the hydration of cement paste blended with C-S-H seeds are capillary porous material and low density C-S-H. It was concluded that this higher amount of loosely packed hydrates is consequence of an increase in the number precipitation spots, and that their packing density depends on the curing temperature, and amount of C-S-H seeds used.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据