Interfacial bond strength of coloured SCC repair layers: an experimental and optimisation study

This study investigates experimentally and analytically the interfacial bond strength of coloured SCC repair layers. Ten mixes with 5%, 10% 15% blue, green or red pigments were produced to examine their fresh properties. Subsequently, 60 specimens tested assess using pull-off push-out tests. The results confirm that reduce mechanical properties its concrete substrates, pigment reducing (by up 41%) strength. It is shown test effective determine shear between layers substrates. A GNNC-Modified PSO algorithm proposed calculate accurately (R2 = 0.95) contributes towards developing more methods accurate models used in this study.