Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Light induced self-healing in concrete using novel cementitious capsules containing UV curable adhesive
Abstract Cracking related deterioration is one of the most important sources of risk that seriously influences the integrity and durability of concrete structures. In this study, a novel type of light induced self-healing mechanism was designed and prepared for automatic healing of cracks in concrete. The self-healing mechanism consists of waterproofing cementitious capsules filled with UV adhesive and a UV light radiator. The shell of capsule is made of three separated but organically bonded functional layers. UV adhesive was first time employed as healing agent for concrete self-healing. The survival of the prepared capsules in the cementitious materials and the ability of capsules to break upon crack were testified. The self-healing efficiency in concrete was evaluated in terms of mechanical recovery, water absorption and water permeability. The test results implied that the proposed self-healing mechanism can be used as an ideal option in revitalizing the performance of cracked concrete.
Highlights Novel cementitious capsules were prepared for self-healing cracks in concrete. UV curable adhesive was first time employed as healing agent to be encapsulated for concrete self-healing. The prepared Cel capsule has good survival ability in both water, cement paste and mortar medium. The propagation of crack could break the embedded capsules followed by releasing the healing agent to the space of crack. Obvious self-healing effect of the cementitious capsule was characterized in cracked concrete.
Light induced self-healing in concrete using novel cementitious capsules containing UV curable adhesive
Abstract Cracking related deterioration is one of the most important sources of risk that seriously influences the integrity and durability of concrete structures. In this study, a novel type of light induced self-healing mechanism was designed and prepared for automatic healing of cracks in concrete. The self-healing mechanism consists of waterproofing cementitious capsules filled with UV adhesive and a UV light radiator. The shell of capsule is made of three separated but organically bonded functional layers. UV adhesive was first time employed as healing agent for concrete self-healing. The survival of the prepared capsules in the cementitious materials and the ability of capsules to break upon crack were testified. The self-healing efficiency in concrete was evaluated in terms of mechanical recovery, water absorption and water permeability. The test results implied that the proposed self-healing mechanism can be used as an ideal option in revitalizing the performance of cracked concrete.
Highlights Novel cementitious capsules were prepared for self-healing cracks in concrete. UV curable adhesive was first time employed as healing agent to be encapsulated for concrete self-healing. The prepared Cel capsule has good survival ability in both water, cement paste and mortar medium. The propagation of crack could break the embedded capsules followed by releasing the healing agent to the space of crack. Obvious self-healing effect of the cementitious capsule was characterized in cracked concrete.
Light induced self-healing in concrete using novel cementitious capsules containing UV curable adhesive
Lv, Leyang (Autor:in) / Guo, Peiyan (Autor:in) / Liu, Gang (Autor:in) / Han, Ningxu (Autor:in) / Xing, Feng (Autor:in)
28.10.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Feasibility of self-healing in cementitious materials – By using capsules or a vascular system?
| Online Contents | 2014