Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Investigation the self-healing mechanism of aged bitumen using microcapsules containing rejuvenator
Graphical abstract The capillarity behaviors of rejuvenator in self-healing bitumen by microcapsules, (a–c) a microcrack was generated by liquid N2 with the width about 10–15μm, the microcrack propagates and pierce the shells of microcapsules, (d and e) the liquid of rejuvenator leaked out from microcapsules and flowed into the microcapsules, and (f) movement trace and direction of rejuvenator during the capillarity. Display Omitted
Highlights The microcapsules containing rejuvenator can be broken by microcracks. With the help of capillarity, the rejuvenator can fill the microcracks. With the help of the penetration of rejuvenator, the aged bitumen has a trance to recovery its virgin properties.
Abstract The aim of this paper is to investigate the self-healing mechanism of aged bitumen using microcapsules containing rejuvenator. Various microcapsule samples were successfully fabricated and the mean size and shell thickness were adjusted. It was found that the shell thickness was not greatly affected by the core/shell ratios and the emulsion stirring rates. These microcapsules can survive in melting bitumen with a good thermal stability. Based on these data, a typical microcapsule sample, fabricated by 3000rmin−1 with core/shell ratio of 2/1, was selected to investigate the self-healing mechanism. The whole self-healing process was observed including the crack generation, capillarity and the diffusion behaviors. The results showed that microcapsules broke by microcracks and leaked the oily–liquid rejuvenator into microcracks. With the help of capillarity, the rejuvenator filled the cracks with a movement speed mainly determined by the volume of microcapsules in bitumen. A diffusion phenomenon was also observed by using a fluorescence microscope. Properties of virgin and rejuvenated bitumen measurements confirmed that the aged bitumen can be partly recovered by the microcapsules containing rejuvenator.
Investigation the self-healing mechanism of aged bitumen using microcapsules containing rejuvenator
Graphical abstract The capillarity behaviors of rejuvenator in self-healing bitumen by microcapsules, (a–c) a microcrack was generated by liquid N2 with the width about 10–15μm, the microcrack propagates and pierce the shells of microcapsules, (d and e) the liquid of rejuvenator leaked out from microcapsules and flowed into the microcapsules, and (f) movement trace and direction of rejuvenator during the capillarity. Display Omitted
Highlights The microcapsules containing rejuvenator can be broken by microcracks. With the help of capillarity, the rejuvenator can fill the microcracks. With the help of the penetration of rejuvenator, the aged bitumen has a trance to recovery its virgin properties.
Abstract The aim of this paper is to investigate the self-healing mechanism of aged bitumen using microcapsules containing rejuvenator. Various microcapsule samples were successfully fabricated and the mean size and shell thickness were adjusted. It was found that the shell thickness was not greatly affected by the core/shell ratios and the emulsion stirring rates. These microcapsules can survive in melting bitumen with a good thermal stability. Based on these data, a typical microcapsule sample, fabricated by 3000rmin−1 with core/shell ratio of 2/1, was selected to investigate the self-healing mechanism. The whole self-healing process was observed including the crack generation, capillarity and the diffusion behaviors. The results showed that microcapsules broke by microcracks and leaked the oily–liquid rejuvenator into microcracks. With the help of capillarity, the rejuvenator filled the cracks with a movement speed mainly determined by the volume of microcapsules in bitumen. A diffusion phenomenon was also observed by using a fluorescence microscope. Properties of virgin and rejuvenated bitumen measurements confirmed that the aged bitumen can be partly recovered by the microcapsules containing rejuvenator.
Investigation the self-healing mechanism of aged bitumen using microcapsules containing rejuvenator
Su, Jun-Feng (Autor:in) / Schlangen, Erik (Autor:in) / Wang, Ying-Yuan (Autor:in)
Construction and Building Materials ; 85 ; 49-56
21.03.2015
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Investigation the self-healing mechanism of aged bitumen using microcapsules containing rejuvenator
| Online Contents | 2015
| British Library Online Contents | 2016
| British Library Online Contents | 2016