TY - JOUR
T1 - A study on the bond strength of interface between post-fire concrete and different epoxy resin adhesives
AU - Guo, Xiao
AU - Xie, Kaizhong
AU - Liu, Zhenwei
AU - Elchalakani, Mohamed
AU - Zhou, Yiming
PY - 2023/12/1
Y1 - 2023/12/1
N2 - 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.
AB - 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.
KW - Bonding performance
KW - Bonding-dissociation constitutive relation
KW - Concrete-resin interface
KW - Epoxy resin adhesive
KW - Reinforcement after high temperature
UR - http://www.scopus.com/inward/record.url?scp=85173176317&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2023.133429
DO - 10.1016/j.conbuildmat.2023.133429
M3 - Article
AN - SCOPUS:85173176317
SN - 0950-0618
VL - 407
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 133429
ER -