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Effects of Modified Nano-SiO2 Particles on Properties of High-Performance Cement-Based Composites

by 1,2,*, 1,2 and 1,2
1
School of Materials Science and Engineering, Southeast University, Nanjing 21189, China
2
JiangSu Key Laboratory of Construction Materials, Nanjing 211189, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(3), 646; https://doi.org/10.3390/ma13030646
Received: 6 December 2019 / Revised: 13 January 2020 / Accepted: 27 January 2020 / Published: 1 February 2020
(This article belongs to the Special Issue Material Modifications of High Performance Concrete Properties)
In this research, silane coupling agent was used to modify the surface of nano-SiO2, particles and the effects of modified nano-SiO2 particles on the mechanical properties of high-performance cement-based composites and its mechanism were systematically studied. The results indicated that the optimum modification parameters were a coupling agent content of 10%, reaction temperature of 65 °C, and reaction time of 8 h. Compared with the unmodified nano-SiO2, the modified nano-SiO2 promoted and accelerated the hydration process of cement. The pozzolanic effect, filling effect, and nucleation effect of modified nano-SiO2 made the microstructure of the composite more compact, and thus improved static mechanical properties of cement-based composites. View Full-Text
Keywords: modified nano-SiO2 particles; high-performance cement-based composites; hydration; dispersibility; microstructure modified nano-SiO2 particles; high-performance cement-based composites; hydration; dispersibility; microstructure
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MDPI and ACS Style

Rong, Z.; Zhao, M.; Wang, Y. Effects of Modified Nano-SiO2 Particles on Properties of High-Performance Cement-Based Composites. Materials 2020, 13, 646. https://doi.org/10.3390/ma13030646

AMA Style

Rong Z, Zhao M, Wang Y. Effects of Modified Nano-SiO2 Particles on Properties of High-Performance Cement-Based Composites. Materials. 2020; 13(3):646. https://doi.org/10.3390/ma13030646

Chicago/Turabian Style

Rong, Zhidan, Mingyu Zhao, and Yali Wang. 2020. "Effects of Modified Nano-SiO2 Particles on Properties of High-Performance Cement-Based Composites" Materials 13, no. 3: 646. https://doi.org/10.3390/ma13030646

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