There were self-healing tests out there using TDCB and impact tests, but there are not the best way to represent formation and healing of a crack.
Dear Iee Lee Hia
This article may be helpful for you
https://www.researchgate.net/publication/313649871_Studying_the_Combination_Effect_of_Additives_and_Micro_Steel_Fibers_on_Cracks_of_Self-Healing_Concrete
Article Studying the Combination Effect of Additives and Micro Steel...
You can see the following article. regards.
This may be
http://www.sciencedirect.com/science/article/pii/S0950061814007235
http://www.penetron.it/public/allegati_certificati/Allegato%208.pdf
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