Fig. 5: Application of PUAO-50 as a strong adhesive to repair concrete.
From: Locking small solvents by hypercrosslinked polymers towards sterically hindered organogels
a Image of PUAO-50 permeating into concrete cracks with different widths. b Penetration depth of PUAO-50 into concrete cracks with different widths. c Adhesion strength of PUAO-50 to concrete under different conditions. d Images of repaired broken concrete using PUAO-50 doped with a fluorescent dye. e Images of repaired broken concrete holding a 1 kg weight. f Enlarged images of surface and internal cracks. g 3D CT reconstruction images of concrete, cracks, and PUAO-50 in a repaired sample. h 3D CT tomography images. i SEM image of a section of a repaired crack. The yellow dashed line represents the boundary between PUAO-50 and concrete. j Compressive curves and k compressive and flexural strengths of control and repaired concrete samples. l Compressive strength of concrete repaired after multiple times. The centre of error bars and the error bars respectively correspond to the mean value and standard deviation of 3–6 measurements for each analysis.
