Title: Research on the application of nano modified epoxy resin adhesive in the repair of cracks in building concrete

Authors: Yungen Zhang; Long Ke

Addresses: School of Civil Engineering, Southwest Jiaotong University Hope Collegy, Chengdu, 610400, Sichuan, China ' School of Civil Engineering, Southwest Jiaotong University Hope Collegy, Chengdu, 610400, Sichuan, China

Abstract: In order to optimise the performance of repair materials and improve the mechanical properties of cracked concrete structures, this paper studies the application effect of nano modified epoxy resin adhesive materials in the repair of cracks in building concrete after preparing them. Three sets of samples were prepared by modifying epoxy resin adhesives with nano Al₂O₃, nano CaCO₃, and nano SiO₂ materials. It was found that the adhesive modified with 2% nano Al₂O₃ material performed better. Finally, after testing and repairing cracked concrete specimens, it was found that the maximum compressive strength of cracked concrete specimens can still reach 193.47 N/mm² after being repaired with nano modified epoxy resin adhesive. After multiple freeze-thaw cycles, the flexural strength of the specimens is still close to 80 MPa, indicating that nano modified epoxy resin adhesive has a good crack repair effect.

Keywords: nano materials; modified epoxy resin adhesive; building concrete specimens; concrete cracks; crack repair.

DOI: 10.1504/IJMMP.2025.143426

International Journal of Microstructure and Materials Properties, 2025 Vol.18 No.1/2, pp.102 - 115

Received: 28 Apr 2024
Accepted: 07 Aug 2024
Published online: 19 Dec 2024 *

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