Issue |
E3S Web Conf.
Volume 391, 2023
4th International Conference on Design and Manufacturing Aspects for Sustainable Energy (ICMED-ICMPC 2023)
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Article Number | 01204 | |
Number of page(s) | 7 | |
DOI | https://doi.org/10.1051/e3sconf/202339101204 | |
Published online | 05 June 2023 |
Effect of particle size of colloidal nano-silica on the properties of the SCM based concrete
1 Research Scholar, Department of Civil Engineering, JNTUH CEH, Hyderabad
2 Professor of Civil Engineering, CVR College of Engineering, Hyderabad
3 Professor of Civil Engineering, GRIET, Hyderabad, Email: vempada@gmail.com
4 Professor of Civil Engineering, VJIT, Hyderabad
5 Department of Civil Engineering, JBIET, Hyderabad
* Corresponding author: kumarjyo2003@yahoo.com
In the current study, effect of particle size of colloidal nano-silica on the properties of the SCM based concrete is studied. The nano-silica particle sizes adopted for the study are 30nm, 60nm and 90 nm. The M20 grade concrete system is made up of cement (C), fly ash (FA), micro-silica (mS) and nano-silica (nS). Compressive strength test at 60 days and pore structure analysis are carried out for C-FA-mS-nS system. The hydration of Portland cement is significantly influenced by the colloidal nanosilica (CNS) particle size. High doses of nS content boost the pozzolanic reaction and the creation of CSH and CASH gels, but they also have a negative impact on the strength development of the material by increasing microcracking due to the self-desiccation effect. The addition of nanosilica to concrete can significantly enhance its qualities after hardening because it ensures the pozzolanic reaction, the seeding effect, which both increase the degree of hydration, and the filling effect, which can fill the internal porosity defects. The cement-mS system's impermeability was greatly improved by the nS because it improved the microstructure, increased the complexity of the pore structure, and refined the pore structure.
Key words: Colloidal nanosilica / micro silica / silica fume / flocculation / agglomeration
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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