| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Influence of TiO2 Nanoparticles on Hydration and Chloride Erosion of
Cement-fly Ash System |
| LI Hainan1, MA Baoguo2, TAN Hongbo2, MEI Junpeng2
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1 Accounting College, Wuhan Textile University, Wuhan 430200;
2 State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070 |
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Abstract Micro-thermal analysis, X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and mercury intrusion porosimetry (MIP) were employed in the present work to study the hydration-hardening performance and the chloride erosion resistance of cement-fly ash system containing TiO2 nanoparticles. Results showed that the synergic action of heterogeneous nucleation effect and micro-aggregate filling effect of TiO2 particles promotes the hydration of cement, accelerates the secondary hydration of fly ash and causes pore volume decrease of the matrix. In consequence, the hardened pastes become more homogeneous and compact, resulting in an improvement in mechanical properties and chloride erosion resistance.
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Published: 11 March 2019
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| Fund:This work was financially supported by the open foundation of State Key Laboratory of Silicate Materials for Architectures of Wuhan University of Technology (SYSJJ2018-14), the National Key R & D Program of China (2016YFC0701003-5). |
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2019, Vol. 33 
