20.500.12556/DiRROS-22202 Active-enhanced core-shell microcapsules for self-healing properties of asphalt mortar preparation and performance research Microcapsule technology actively repairs microcracks in asphalt pavement, extending its service life. This study develops multi-healing core-shell microcapsules consisting of a core (polyurea formaldehyde sub-capsules containing sunflower oil) and a shell (calcium alginate capsule) that provides protection and enables delayed release. Scanning electron microscopy (SEM) results show the microcapsules have evenly distributed chambers with an average diameter of approximately 2 mm. The core content and encapsulation efficiency are measured at 65.38 % and 78.52 %, respectively, while the shell exhibits an average hardness of 0.27 GPa. Thermogravimetric analysis indicates the microcapsules can withstand high temperatures up to 230℃. Through multiple self-healing tests, the study demonstrates that the core-shell microcapsules provide sustainable and repeated repair effects on asphalt, with an optimal dosage of 1.5 wt% in asphalt mortar. The self-healing effect improves with increasing dosage, healing time, and healing temperature. The microcapsules continuously release rejuvenator, repairing cracks and enhancing asphalt performance. self-healing microcapsules asphalt pavement core-shell structure multi-healing capability samozdravilne mikrokapsule asfaltna voziščna konstrukcija struktura jedro-lupina zmogljivost večkratnega zdravljenja true false true Elsevier Angleški jezik Slovenski jezik © 2025 Elsevier Ltd Neznano 2025-05-09 08:17:03 2025-05-09 08:41:26 2025-10-24 03:50:48 0000-00-00 00:00:00 2025 0 0 str. 1-14 [article no.] 141113 Vol. 474 May 2025 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 2025-04-05 2027-04-05 620.1/.2 1879-0526 10.1016/j.conbuildmat.2025.141113 234472451 https://www.sciencedirect.com/science/article/pii/S0950061825012619 1 3ad370fd-2c9d-11f0-963a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=32135 AAM_Active-enhanced_core-shell_microcapsules_234472451.pdf AAM_Active-enhanced_core-shell_microcapsules_234472451.pdf 1 A5EE683328A1B0A71E45AD118FC05A84 4a8fe9b60b36a1d2a78d2468272e6e3822f441aad766466487fbdb3770adf8db 9746a81a-2ca0-11f0-963a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=32136 Zavod za gradbeništvo Slovenije 0 0 0