Publicação
Healing of bituminous mixtures incorporating bio-oil capsules and steel slag filler
| Resumo: | Developing eco-friendly road pavement maintenance practices is essential to reduce environmental and economic impacts. In this context, bituminous mixtures with enhanced self-healing capacity, combined with healing-based maintenance techniques, can contribute to more sustainable pavements by extending service life and reducing associated costs. This study evaluates the healing performance of bituminous mixtures modified with encapsulated bio-oil and steel slag filler. Two healing procedures were applied: (1) a 6-h rest at 20 °C, and (2) post-damage compaction after heating at 50 °C. Healing performance was assessed using indexes based on dynamic modulus ( HIm ) and fatigue life ( HIc ). Procedure 2 enabled full stiffness recovery, with HIm reaching 100 %, and improved fatigue life by more than 50 % ( HIc ). In contrast, procedure 1 yielded lower recovery, with HIm limited to 50 % and HIc below 30 %. The incorporation of bio-oil capsules and steel slag filler did not significantly influence healing under the conditions tested. |
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| Autores principais: | Cabette, Marina |
| Outros Autores: | Micaelo, Rui; Pais, Jorge |
| Assunto: | Bio-oil Bituminous mixtures Encapsulation Fatigue-healing Healing materials Civil and Structural Engineering Building and Construction General Materials Science |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| Resumo: | Developing eco-friendly road pavement maintenance practices is essential to reduce environmental and economic impacts. In this context, bituminous mixtures with enhanced self-healing capacity, combined with healing-based maintenance techniques, can contribute to more sustainable pavements by extending service life and reducing associated costs. This study evaluates the healing performance of bituminous mixtures modified with encapsulated bio-oil and steel slag filler. Two healing procedures were applied: (1) a 6-h rest at 20 °C, and (2) post-damage compaction after heating at 50 °C. Healing performance was assessed using indexes based on dynamic modulus ( HIm ) and fatigue life ( HIc ). Procedure 2 enabled full stiffness recovery, with HIm reaching 100 %, and improved fatigue life by more than 50 % ( HIc ). In contrast, procedure 1 yielded lower recovery, with HIm limited to 50 % and HIc below 30 %. The incorporation of bio-oil capsules and steel slag filler did not significantly influence healing under the conditions tested. |
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