With increasing of the strain rate, the strength of specimens gradually increased. Both the strain rate and microcapsule contents influenced the strength and pore structure. The effects of the microcapsule contents and strain rate on the mechanical properties, pore structure and self-healing efficiency were investigated in this study. As emulsion droplets show excellent potential as building blocks for assemblies, our findings offer new paradigms for the development and application of assemblies.Ī physical triggered self-healing system was formed by mixing the epoxy/urea-formaldehyde microcapsules into cementitious materials. This is the first work that acid/alkali-resistant and geometry reshaping of emulsion droplet assemblies have been addressed. In addition, these assemblies can be easily processed into various shapes that can be further sculpted into more complex geometries through a combination of localized photoreduction and anion etching, which demonstrates the reshaping ability of the assemblies and allows the assemblies to adapt to a variety of spatial structure requirements in applications. Benefiting from the chloride corrosion and photothermal conversion features of Ag NCs, the resulting assemblies manifest a slow chloride ion response and fast NIR response. Due to the strong binding effect of the Ag NCs and their high chemical inertness against acids and bases, the resulting assemblies exhibit a remarkable acid/alkali resistance, which makes them distinct from previous emulsion droplet assemblies. Herein, novel emulsion droplet assemblies with Ag nanocrystals (Ag NCs) as “binding agents” are fabricated via a facile method combining Ag + coordination and photoreduction. However, studies into their structural stability in strong acid/alkali aqueous environments and geometry reshaping of these assemblies are rare. In addition, the experimental results are compared with the predictions of the European and Japanese design codes as well as the Chinese design codes.Įmulsion droplet assemblies have evolved dramatically in recent years due to their hierarchical structure and advanced performance. An amount of ductility is observed at the point of failure of the beams subjected to ICCP-SS intervention. The beams with the ICCP-SS intervention fail due to fatigue fracture of the steel reinforcement followed by a combination of slippage and rupture of the carbon fibre meshes. In comparison to those of the corroded beams without any additional measures, the fatigue lives of the treated beams are significantly improved, by as much as 202%. More importantly, the ICCP-SS intervention significantly enhances the fatigue resistance of the flexural members. The test results show that the corrosion of the steel reinforcements in the cathodically protected beams is effectively prevented. The experimental programme comprises 16 RC beams subjected to accelerated corrosion and ICCP followed by four-point bending tests. This paper presents the results of an experimental and analytical study of the fatigue performance of corroded simply supported beams with ICCP-SS intervention. To improve the fatigue resistance of degraded reinforced concrete (RC) beams, the present study employs a dual-functional intervention, impressed current cathodic protection and structural strengthening (ICCP-SS).
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