Effects of Autogenous and Stimulated Self-Healing on Durability and Mechanical Performance of UHPFRC: Validation of Tailored Test Method through Multi-Performance Healing-Induced Recovery Indices

Chloride diffusion and penetration, consequently chloride-induced corrosion of reinforcement, are among the most common mechanisms deterioration concrete structures, and, as such, widely deeply investigated well. The benefits using Ultra-High Performance (Fiber-Reinforced) Concrete—UHP(FR)C to extend service life structures in “chloride attack” scenarios have been addressed, mainly focusing on higher “intrinsic” durability aforementioned category materials due their compact microstructure. Scant, if nil, information exists chloride penetration resistance UHPC cracked state, which would be utmost importance, also considering peculiar (tensile) behavior material its high inborn autogenous healing capacity. On other hand, studies aimed at quantifying delay promoted by self-healing, both autonomous, (ordinary) started being promoted, further highlighting need investigate multidirectional features phenomenon, direction parallel orthogonal cracks. In this paper, a tailored experimental methodology is presented validated measure, with reference features, effects it stimulated via crystalline admixtures. based micro-core drilling different positions depths disks splitting submitted exposure/healing times 33 g/L NaCl aqueous solution. Its validation completed through comparison visual image analysis crack sealing same specimens well assessment mechanical permeability healing-induced recovery performed, previously authors, companion specimens.