期刊
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
卷 56, 期 6, 页码 1395-1402出版社
SCIENCE PRESS
DOI: 10.1007/s11431-013-5221-6
关键词
C-S-H gel; complex binder; ground granulated blast furnace slag; nanoindentation
资金
- National Basic Research Program of China (973 Project) [2009CB623106]
- National Natural Science Foundation of China [U1134008]
The characteristics of C-S-H gel in hardened Portland cement pastes and complex binder pastes with ground granulated blast furnace slag were investigated with nanoindentation. The composition of C-S-H gel was analysed with SEM-EDS. The obtained results showed that the volume fraction of LD C-S-H gradually reduced and the volume fraction of HD C-S-H increased with the prolongation of hydration age. Most of the C-S-H gel produced at later age was HD C-S-H. The volume fraction of HD C-S-H increased as the fraction of slag in complex binder pastes increased, suggesting that HD C-S-H was mainly in the hydration products of slag. The chemichal compositions of the two types of C-S-H gel were simlar, meaning that formation and transformation of the two types of C-S-H gel were not affected by their Ca/Si ratio.
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