Self-healing of slag-cement ultra-high performance steel fiber reinforced concrete (UHPFRC) containing sisal fibers as healing conveyor

This paper presents the results of a research on influence sisal fibers self-healing capacity slag-cement UHPFRC reinforced with steel fibers. In order to evaluate composite healing capacity, specimens were submitted pre-cracking by tensile test and then 3 months wetting drying cycles treatment. Treated resubmitted evaluated Optical Electronic microscopy CT Scan. Results indicate that fiber works as conveyor improving about 20% 15% stress post cracking energy treated specimens, respectively. Sisal played major role densifying interface, working vehicle for agents into small interface cracks. All cracks under 80 μm could completely self-seal mainly calcium carbonate. Wider not be sealed, though exhibited recovery mechanical behavior essentially due late hydration.