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A platform for research: civil engineering, architecture and urbanism
Impermeability characteristics of cementitious materials with self-healing based on epoxy/urea-formaldehyde microcapsules using an immersion test
Highlights Studied the impermeability properties of self-healing cementitious composite material, including pore structure. Microcapsules have positively effect on the impermeability and pore structure of cementitious composite material. The self-healing efficiency of impermeability and pore structure increases with the increasing of content of the microcapsules and natural immersion days. A certain distinction existed in the effects of different content of microcapsule on the chloride penetration depth.
Abstract A cementitious self-healing system was built using epoxy/urea-formaldehyde microcapsules. The effects of microcapsule content and soaking in chloride on impermeability, pore structure, and self-healing efficiency were investigated. Both microcapsule content and soaking length influenced impermeability and pore structure. With increasing microcapsule content, the impermeability of sound and damaged cementitious composite material specimens increased and then decreased; the impermeability of healing specimens gradually increased. The healing and recovery rates of impermeability increased up to 90 days soaking and then stabilized. Microcapsules positively influenced self-healing but negatively influenced the microstructure of sound specimens. Models to predict microcapsules’ effect on pore structure and impermeability were established.
Impermeability characteristics of cementitious materials with self-healing based on epoxy/urea-formaldehyde microcapsules using an immersion test
Highlights Studied the impermeability properties of self-healing cementitious composite material, including pore structure. Microcapsules have positively effect on the impermeability and pore structure of cementitious composite material. The self-healing efficiency of impermeability and pore structure increases with the increasing of content of the microcapsules and natural immersion days. A certain distinction existed in the effects of different content of microcapsule on the chloride penetration depth.
Abstract A cementitious self-healing system was built using epoxy/urea-formaldehyde microcapsules. The effects of microcapsule content and soaking in chloride on impermeability, pore structure, and self-healing efficiency were investigated. Both microcapsule content and soaking length influenced impermeability and pore structure. With increasing microcapsule content, the impermeability of sound and damaged cementitious composite material specimens increased and then decreased; the impermeability of healing specimens gradually increased. The healing and recovery rates of impermeability increased up to 90 days soaking and then stabilized. Microcapsules positively influenced self-healing but negatively influenced the microstructure of sound specimens. Models to predict microcapsules’ effect on pore structure and impermeability were established.
Impermeability characteristics of cementitious materials with self-healing based on epoxy/urea-formaldehyde microcapsules using an immersion test
Han, Tielin (author) / Wang, Xianfeng (author) / Li, Dawang (author) / Li, Dongfeng (author) / Xing, Feng (author) / Han, Ningxu (author)
2020-05-30
Article (Journal)
Electronic Resource
English
Self-healing features in cementitious material with urea–formaldehyde/epoxy microcapsules
| British Library Online Contents | 2016
Self-healing features in cementitious material with urea–formaldehyde/epoxy microcapsules
| British Library Online Contents | 2016
Self-healing features in cementitious material with urea–formaldehyde/epoxy microcapsules
| Online Contents | 2016