A remark on nano-particle stability of cement C-S-H gel

作者：Ficker Tomas^*; Len Adel; Martisek Dalibor

来源：Central European Journal of Physics, 2011, 9(2): 553-557.

DOI：10.2478/s11534-010-0028-6

• hydrated cement paste
• calcium-silicate-hydrate
• small-angle neutron scattering
• nano-particles

Hydrated pastes of ordinary Portland cement prepared with different water-to-cement ratios were investigated by using the small-angle neutron scattering technique in the region of Q a (0.0045, 0.11) (-1). Samples of cement pastes were subjected to non-standard hydration conditions using a mix with D2O, low RH, and water-to-cement ratios spread over a very wide interval (0.4; 1.4). The investigation was focused on testing the structural stability of nano-metric particles in the cement C-S-H gel. Owing to the high structural stability of these nano-particles, their average diameter might be used as a microscopic parameter characterizing the nano-metric structure of C-S-H gels. The average diameter of the nano-particles of the studied ordinary Portland cement CEMI 42.5 R-SC was found to be close to the value of 4.2 nm and independent of the water-to-cement ratios.

• 出版日期2011-4