Title: The effect of nano SiO₂ content on the application performance of modified recycled concrete

Authors: Taotao Dong

Addresses: School of International Business and Management, Chongqing Institute of Foreign Studies, Chongqing, 401120, China

Abstract: By studying the effect of nano SiO₂ content on the application performance of modified recycled concrete, materials for preparing nano SiO₂ and modified recycled concrete were selected, and corresponding proportioning schemes were designed to prepare concrete specimens. In the testing of application performance indicators such as compressive strength, splitting tensile strength, shear strength, total cracking area, and water seepage height, it is found that there were significant differences in the application performance of modified recycled concrete under the four nano SiO₂ dosages of 0%, 0.5%, 1.0%, and 1.5%. Especially at the 1% nano SiO₂ content, concrete specimens exhibit the highest compressive strength, splitting tensile strength, and shear strength, while the total cracking area and water seepage height are also the smallest, with the total cracking area per unit area decreasing to 203.1 mm². Therefore, the appropriate addition of nano SiO₂ can effectively improve the application performance of modified recycled concrete.

Keywords: nano SiO₂; modified recycled concrete; application performance; splitting tensile strength; cracking area.

DOI: 10.1504/IJMMP.2024.142802

International Journal of Microstructure and Materials Properties, 2024 Vol.17 No.4, pp.364 - 376

Received: 06 Sep 2023
Accepted: 07 Feb 2024
Published online: 22 Nov 2024 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article