Title: The dynamic mechanical properties of nano-SiO₂ concrete after freezing and thawing

Authors: Tong Shan

Addresses: Department of Management, Changchun University of Architecture, Changchun, 130604, China

Abstract: The freeze-thaw cycle will have a significant impact on the mechanical properties of concrete; therefore, research on the dynamic mechanical properties of nano-SiO₂ concrete after freeze-thaw is carried out. Firstly, select the materials for the concrete specimen and design the mix ratio for specimen preparation. Secondly, prepare nano-SiO₂ concrete specimens and conduct freeze-thaw cycling tests. Finally, the dynamic mechanical properties of nano-SiO₂ concrete were studied using mass loss rate, relative elastic modulus, frost resistance durability index, and compressive strength as indicators. The test results show that under the freeze-thaw cycle test of three types of concrete specimens, the mass loss rate of concrete is the lowest, the relative elastic modulus decreases the lowest, the frost resistance durability index is the highest, and the 56d compressive strength is the highest with a 6% nano-SiO₂ content.

Keywords: nano-SiO₂ concrete; freeze-thaw cycle; dynamic mechanical properties; compressive strength.

DOI: 10.1504/IJMMP.2024.142799

International Journal of Microstructure and Materials Properties, 2024 Vol.17 No.4, pp.322 - 332

Received: 07 Aug 2023
Accepted: 07 Feb 2024
Published online: 22 Nov 2024 *

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