Title: The effect of nano-SiO₂ strengthening the performance of recycled concrete under ion erosion environment

Authors: Bangyao Li

Addresses: Department of Architectural Engineering, Zhengzhou Electric Power Technology College, Zhengzhou, 451450, China

Abstract: In order to fully understand the performance of nano-SiO₂ reinforced recycled concrete against ion erosion, a study on the impact of nano-SiO₂ reinforced recycled concrete performance under ion erosion environment is proposed. Firstly, select the materials for preparing concrete specimens and design the ratio parameters for the preparation of nano-SiO₂ reinforced recycled concrete specimens. Secondly, set the solubility of NaCI solution to simulate ion erosion environment. Finally, the performance of concrete was tested and analysed from four aspects: ion erosion, compressive strength, flexural strength, and microstructure. The test results indicate that with the increase of nano-SiO₂ content, recycled concrete can better resist the erosion of chloride ions, and the compressive and flexural tensile properties of concrete specimens are also improved. The microstructure of concrete specimens is denser, and the voids are reduced.

Keywords: ion erosion; nano-SiO₂; recycled concrete; bending and tensile strength; microstructure.

DOI: 10.1504/IJMMP.2024.137983

International Journal of Microstructure and Materials Properties, 2024 Vol.17 No.2/3, pp.295 - 306

Received: 28 Jul 2023
Accepted: 09 Nov 2023
Published online: 15 Apr 2024 *

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