PSI - Issue 70

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ScienceDirect

Procedia Structural Integrity 70 (2025) 401–408

Structural Integrity and Interactions of Materials in Civil Engineering Structures (SIIMCES-2025) Study of Flash-Based Concrete with Nano-SiO ₂ Particles by Destructive Test R. Mohanraj a , Aryan Katri a, * a Civil engineering, Faculty of Engineering & Technology, SRM University, Delhi-NCR, Ssonipat-131029, Haryana, India Abstract The impact of nano- SiO₂ on the mechanical and microstructural characteristics of concrete was examined in this work. Nano SiO₂ doses ranging from 0% to 5% were used to prepare concrete samples, which were then examined for workability using the slump test. Microstructural alterations were investigated using Fourier Transform Infrared (FTIR) spectroscopy, and compressive strength was determined using a Compression Testing Machine (CTM). According to the results, nano- SiO₂ increased the strength by accelerating hydration and decreasing porosity, and increasing the formation of calcium silicate hydrate (C-S-H) gel. however, at high doses, particle accumulation occurred, which weakens mechanical performance. FTIR measurement confirms enhanced silicate polymerization and reduced calcium hydroxide levels, leading to improved microstructural compaction. Although workability is impacted by nano- SiO₂, performance can be maximized with the right mix modifications. According to this study, nano- SiO₂ is a practicable additive for improving the qualities of concrete, which will help create high -performance and sustainable concrete. Future studies should concentrate on investigating interactions with additional admixtures and filtering dispersion methods. © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of International Conference on Structural Integrity Organizers

Keywords: Nano-SiO 2 ; Nano concrete; destructive test; sorptivity test; FTIR;

*Corresponding author. Tel.: +91-9813765200 E-mail address: aryankhatri901@gmail.com

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of International Conference on Structural Integrity Organizers 10.1016/j.prostr.2025.07.070