Self-Healing Potential and Post-Cracking Tensile Behavior of Polypropylene Fiber-Reinforced Cementitious Composites

The use of synthetic fibers as reinforcement in fiber-reinforced cementitious composites (FRCC) demonstrates a combination better ductile response vis-à-vis metallic ones, enhanced durability high pH environment, and resistance to corrosion well self-healing capabilities. This study explores the effect macro- micro-scale polypropylene (PP) on post-crack energy, ductility, potential FRCC. Laboratory results indicate significant change fracture response, i.e., loss ductility curing time increases. PP fiber samples cured for 2 days demonstrated behavior, controllable crack growth during tensile testing, post-cracking regain strength owing FRCC’s mechanism. Different mixes FRCC suggest an economical mixing methodology, where strong bond between matrix plays key role improving mortar. Additionally, micro demonstrate micro-crack propagation, observed increase peak load value shape deformation compression tests. Notably, low volume fraction macro-scale revealed higher energy than dosage fibers. Lastly, few with < 0.5 mm exhibited mechanism, upon healed specimens illustrated strain values.