TY - JOUR
T1 - Shear-bond behavior of self-compacting geopolymer concrete to conventional concrete
AU - Purwanto,
AU - Ekaputri, Januarti Jaya
AU - Nuroji,
AU - Indriyantho, Bobby Rio
AU - Han, Aylie
AU - Gan, Buntara Sthenly
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/2/28
Y1 - 2022/2/28
N2 - The shear-bond behavior of two mechanically different concretes is fundamental when conducting external reinforcement, retrofitting, or repair. The two components are designed to possess full strain compatibility in sustaining the stress transfer between the two parts throughout the loading sequence. This work investigated the shear-bond behavior between conventional and self-compacting geopolymer concrete based on the push-off method. The influence of surface roughness on the bond behavior was studied, and a finite element model was constructed and validated to the experimental data. Surprisingly, the chemical bond characteristics of geopolymer concrete have little effect on the bond strength as compared to conventional concrete having the same compression strengths, but significantly influences the load-slip pattern of the interface. As expected, the bond strength was positively influenced by the interface roughness. All failure modes were unmistakably brittle. The strain deformation pattern generated from the finite element model underlined that large strains and stresses were present at the far ends in the interface, where initial cracking was detected in these regions. The study concluded that self-compacting geopolymer concrete is a perfect solution for older structure's external strengthening or retrofitting. This material has a better sustainable and a more environmentally friendly character.
AB - The shear-bond behavior of two mechanically different concretes is fundamental when conducting external reinforcement, retrofitting, or repair. The two components are designed to possess full strain compatibility in sustaining the stress transfer between the two parts throughout the loading sequence. This work investigated the shear-bond behavior between conventional and self-compacting geopolymer concrete based on the push-off method. The influence of surface roughness on the bond behavior was studied, and a finite element model was constructed and validated to the experimental data. Surprisingly, the chemical bond characteristics of geopolymer concrete have little effect on the bond strength as compared to conventional concrete having the same compression strengths, but significantly influences the load-slip pattern of the interface. As expected, the bond strength was positively influenced by the interface roughness. All failure modes were unmistakably brittle. The strain deformation pattern generated from the finite element model underlined that large strains and stresses were present at the far ends in the interface, where initial cracking was detected in these regions. The study concluded that self-compacting geopolymer concrete is a perfect solution for older structure's external strengthening or retrofitting. This material has a better sustainable and a more environmentally friendly character.
KW - Bond-strength
KW - Finite element model
KW - Interface
KW - Roughness
KW - Self-compacting geopolymer concrete
KW - Shear-bond
UR - http://www.scopus.com/inward/record.url?scp=85122645774&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2021.126167
DO - 10.1016/j.conbuildmat.2021.126167
M3 - Article
AN - SCOPUS:85122645774
SN - 0950-0618
VL - 321
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 126167
ER -