Calcium alginate capsules encapsulating rejuvenator as healing system for asphalt mastic

Abstract

h i g h l i g h t s Calcium alginate capsules with rejuvenator are proposed for self-healing asphalt. Individual rejuvenator droplets are stored in porous media inside the capsule. The capsules are able to survive the asphalt mixing and compaction period. Calcium alginate capsules are capable of local crack healing in asphalt mix.

Self‐Healing Asphalt Review: From Idea to Practice

“…Encapsulation of rejuvenator with calcium alginate cross‐linking. Reproduced with permission . Copyright 2018, Elsevier Ltd.…”

“…Based on the alginate encapsulation mechanism, Xu et al successfully encapsulated asphalt rejuvenator with calcium alginate capsules. To produce the calcium alginate capsules, 6 wt% sodium alginate in deionized was prepared.…”

“…a) Microscopic image of calcium alginate capsule, b) rejuvenator released from crashed capsule, and c) cross‐sectional area of capsule. Reproduced with permission . Copyright 2018, Elsevier Ltd.…”

“…Calcium alginate capsules containing rejuvenator: a) TGA test results, b) compressive strength versus curing temperature. Reproduced with permission . Copyright 2018, Elsevier Ltd.…”

“…Therefore, researchers are exploring novel methods to inspire the potential healing capacity of asphalt. Subsequently, various healing methods have been proposed, including nanoparticles, induction healing, and embedded rejuvenator encapsulation …”