Influence of TiO2 Nanoparticles on Hydration and Chloride Erosion of Cement-fly Ash System
LI Hainan1, MA Baoguo2, TAN Hongbo2, MEI Junpeng2
1 Accounting College, Wuhan Textile University, Wuhan 430200; 2 State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070
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.
李海南, 马保国, 谭洪波, 梅军鹏. TiO2纳米颗粒对水泥-粉煤灰体系水化硬化及氯离子侵蚀的影响[J]. 材料导报, 2019, 33(4): 630-633.
LI Hainan, MA Baoguo, TAN Hongbo, MEI Junpeng. Influence of TiO2 Nanoparticles on Hydration and Chloride Erosion of Cement-fly Ash System. Materials Reports, 2019, 33(4): 630-633.
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