Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Biobased Encapsulated Rejuvenators to Promote Extrinsic Self-Healing in Bituminous Materials
Encapsulated rejuvenators have become a promising way to crack-healing autonomously in bituminous materials. This work covers the synthesis of a biobased capsule as an additive to promote extrinsic self-healing in aged asphalt. With this objective, capsules with polynuclear microstructure were synthesised using alginate biopolymer as encapsulating material and sunflower oil as a rejuvenator. The thermal and mechanical stability of the capsules were evaluated by thermogravimetry and compressive tests. Four dense asphalt mixtures were manufactured to assess the capacity of the capsules. Capsules were added in 0.0%, 0.125%, 0.25%, and 0.5%wt content. The effect of the capsules in recovering the mechanical strength of cracked asphalt mixtures was evaluated based on a 3-step process, including mechanical cracking, capsule activation, and quantification of the healing level. The self-healing capacity of the non-encapsulated rejuvenator on aged bitumen was also assessed. The main results showed that the capsule design was thermally and mechanically stable to be incorporated in asphalt mixtures. Moreover, the sunflower oil effectively diffused into the cracked-aged bitumen with a softening effect that promoted its closure. Finally, the addition of capsules at 0.25% wt. Loading significantly improved the self-healing ability of the asphalt mixtures.
Biobased Encapsulated Rejuvenators to Promote Extrinsic Self-Healing in Bituminous Materials
Encapsulated rejuvenators have become a promising way to crack-healing autonomously in bituminous materials. This work covers the synthesis of a biobased capsule as an additive to promote extrinsic self-healing in aged asphalt. With this objective, capsules with polynuclear microstructure were synthesised using alginate biopolymer as encapsulating material and sunflower oil as a rejuvenator. The thermal and mechanical stability of the capsules were evaluated by thermogravimetry and compressive tests. Four dense asphalt mixtures were manufactured to assess the capacity of the capsules. Capsules were added in 0.0%, 0.125%, 0.25%, and 0.5%wt content. The effect of the capsules in recovering the mechanical strength of cracked asphalt mixtures was evaluated based on a 3-step process, including mechanical cracking, capsule activation, and quantification of the healing level. The self-healing capacity of the non-encapsulated rejuvenator on aged bitumen was also assessed. The main results showed that the capsule design was thermally and mechanically stable to be incorporated in asphalt mixtures. Moreover, the sunflower oil effectively diffused into the cracked-aged bitumen with a softening effect that promoted its closure. Finally, the addition of capsules at 0.25% wt. Loading significantly improved the self-healing ability of the asphalt mixtures.
Biobased Encapsulated Rejuvenators to Promote Extrinsic Self-Healing in Bituminous Materials
RILEM Bookseries
Vasconcelos, Kamilla (Herausgeber:in) / Jiménez del Barco Carrión, Ana (Herausgeber:in) / Chailleux, Emmanuel (Herausgeber:in) / Lo Presti, Davide (Herausgeber:in) / Concha, Jose L. (Autor:in) / Arteaga-Pérez, Luis E. (Autor:in) / Norambuena-Contreras, Jose (Autor:in)
The International Workshop on the Use of Biomaterials in Pavements ; 2024 ; Sao Paolo, Brazil
2nd International Workshop on the Use of Biomaterials in Pavements ; Kapitel: 17 ; 164-171
RILEM Bookseries ; 58
20.09.2024
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Enhanced Self-healing Properties in Stone Mastic Asphalt with Encapsulated Bitumen Rejuvenators
| Springer Verlag | 2021