Study on the Self-Healing Performance of Microcapsules and Microcapsule-Containing Asphalt

Mixing microcapsules encapsulating asphalt recycling agents into can effectively enhance its self-healing performance and alleviate the brittle cracking of pavements due to aging. In practical engineering applications, should have good thermal stability, mechanical properties, uniform dispersion in or concrete, for effective micro-cracks which occur as age. The microcapsule-containing is affected by several factors. First, dispersibility were investigated thermogravimetric analysis, nanoindentation tests, fluorescence microscopy. Then, effects microcapsules’ content, temperature, time, degree damage, times on through two-stage fatigue loading tests. results show that dispersibility. They will not thermally decompose when mixing nor they fracture early stages a pavement’s lifetime, agglomerate asphalt. improves performance. index increases then decreases with increase microcapsule content. It also temperature length time increases, but it damage worsens, thus, increases.