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Proposed Acceleratory Effect of TiO 2 Nanoparticles on Belite Hydration: Preliminary Results
Author(s) -
Lee Bo Yeon,
Kurtis Kimberly E.
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04937.x
Subject(s) - belite , inert , nanoparticle , isothermal process , chemical engineering , cement , chemistry , anatase , titanium dioxide , materials science , mineralogy , nuclear chemistry , clinker (cement) , metallurgy , nanotechnology , organic chemistry , portland cement , catalysis , thermodynamics , physics , photocatalysis , engineering
The effect of chemically inert nanoparticles of anatase titanium dioxide ( TiO 2 ) on hydration rate of belite (β‐ C 2 S ) was studied using isothermal calorimetry. The TiO 2 was added to β‐ C 2 S paste at 0%, 5%, and 10% by mass. The results indicate that the addition of TiO 2 nanoparticles shorten the induction period and accelerate hydration beyond 3 days, showing rate peaks at 40 days of age. The cumulative heat data suggests that TiO 2 ‐containing C 2 S pastes increase in degree of hydration at 90 days by 47% compared to neat C 2 S pastes. These results suggest that addition of inert nanoparticles could potentially promote earlier strength gain of C 2 S in cement, ameliorating a perceived deficiency in cement compositions which could contribute to sustainability in terms of lower CO 2 emissions and lower energy use compared to traditional chemistries.