2025 Volume 25 Issue 4 Pages 4_155-4_163
The experiments of post-installed adhesive anchoring systems of epoxy injection resin type were taken in focusing on bond failure (bond strength) during fire assumed joints between members in long term. Concrete strength such as high strength (σB= 44.8 MPa) and low strength (σB= 17.5 MPa) were used as one of parameters. The following conclusions were recognized by their experiments.
1. Bond strength decrease in accordance with increase of temperature in post-installed adhesive anchors.
2. The temperature in bond failure on low concrete strength were lower than ordinary concrete in the past.
3. The influence of concrete strength on high concrete strength for bond strength were not recognized that is, the temperature in bond failure on high concrete strength were not usually lower compared to the past results as the sane conditions.
4. The border move on between bond and the surface of rebars from between bond and the surface of concrete during fire as the difference of ordinary conditions.
5. The influence of the different shape in the surface of rebars were recognized on bond strength during fire.
