Study on hydration process of cement clinker minerals prepared by sol-gel method with ESEM-FEG

被引：0

作者：

Wang, P. M. ^{[1
]}

Liu, X. P. ^{[1
]}

机构：

[1] Tongji Univ, Minist Educ, Key Lab Adv Civil Engn Mat, Shanghai 200092, Peoples R China

来源：

Proceedings of the 6th International Symposium on Cement & Concrete and CANMET/ACI International Symposium on Concrete Technology for Sustainable Development, Vols 1 and 2 | 2006年

关键词：

ESEM-FEG; cement clinker minerals; hydration; sol-gel method;

D O I：

暂无

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

The hydration process of four main cement clinker minerals prepared by sol-gel method has been studied with an environmental scanning electron microscope with field emission gun (ESEM-FEG). Results show typical morphologies at different hydration times. The process of hydration reaction Of C3S and C2S can be divided into five time periods. The C-S-H phases formed by C3S hydration develop from gels to fibers and fibers continue to grow longer with the hydration time. The length of C-S-H fiber is 1.6 mu m after 28 days hydration time of C3S. Portlandite crystals grow from flake to mu m-level and interlocking structure. The hydration process of C2S is similar to but slower than that Of C3S. The length of C-S-H fibers is about 550nm after 28 days hydration time. And there are some gm-level portlandite crystals. Cubic crystals occur very early during the hydration process of C(3)A and C(4)AF. After 2 minutes hydration time Of CA there are already some cubic and foil-like calcium aluminate hydrates. More cubic crystals occur after the hydration time of 12 hours. There are already many cubic crystals after 2 minutes hydration time of C4AF.

引用

页码：398 / 405

页数：8