A study on the bond strength of interface between post-fire concrete and different epoxy resin adhesives

Xiao Guo, Kaizhong Xie, Zhenwei Liu, Mohamed Elchalakani, Yiming Zhou

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In order to investigate the influences of temperature that concrete has undergone on the resin/concrete interface bonding performance for different epoxy resin adhesives, 40 tensile specimens and 24 three-point bending specimens were heated to 200, 300, and 600 ℃, respectively. After natural cooling, resin was injected to form tensile specimens and sandwich specimens, which were subjected to pull-out tests and three-point bending tests, respectively. The interface bond-separation constitutive relationship was obtained to study the influence of fire temperature and different epoxy resin adhesives on the properties of the resin/concrete interface bonding. The results showed that the reinforcement of high-temperature concrete with different permeable epoxy resin adhesives caused the crack initiation load, interface strength, and fracture energy of the concrete/resin interface to increase slightly and then decrease sharply as the temperature of the concrete in the fire increased. When the fire temperature was 200 ℃, the peak value of the bonding performance of high-temperature concrete/resin interface was higher than that at room temperature.

Original languageEnglish
Article number133429
Number of pages12
JournalConstruction and Building Materials
Volume407
DOIs
Publication statusPublished - 1 Dec 2023

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