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Self-Healing Potential and Post-Cracking Tensile Behavior of Polypropylene Fiber-Reinforced Cementitious Composites
| Content Provider | MDPI |
|---|---|
| Author | Garg, Mohit Azarsa, Pejman Gupta, Rishi |
| Copyright Year | 2021 |
| Description | The use of synthetic fibers as reinforcement in fiber-reinforced cementitious composites (FRCC) demonstrates a combination of better ductile response vis-à-vis metallic ones, enhanced durability in a high pH environment, and resistance to corrosion as well as self-healing capabilities. This study explores the effect of macro- and micro-scale polypropylene (PP) fibers on post-crack energy, ductility, and the self-healing potential of FRCC. Laboratory results indicate a significant change in fracture response, i.e., loss in ductility as curing time increases. PP fiber samples cured for 2 days demonstrated ductile fracture behavior, controllable crack growth during tensile testing, post-cracking behavior, and a regain in strength owing to FRCC’s self-healing mechanism. Different mixes of FRCC suggest an economical mixing methodology, where the strong bond between the PP fibers and cementitious matrix plays a key role in improving the tensile strength of the mortar. Additionally, the micro PP fiber samples demonstrate resistance to micro-crack propagation, observed as an increase in peak load value and shape deformation during compression and tensile tests. Notably, low volume fraction of macro-scale PP fibers in FRCC revealed higher post-crack energy than the higher dosage of micro-scale PP fibers. Lastly, few samples with a crack of < 0.5 mm exhibited a self-healing mechanism, and upon testing, the healed specimens illustrated higher strain values. |
| Starting Page | 122 |
| e-ISSN | 2504477X |
| DOI | 10.3390/jcs5050122 |
| Journal | Journal of Composites Science |
| Issue Number | 5 |
| Volume Number | 5 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-05-07 |
| Access Restriction | Open |
| Subject Keyword | Journal of Composites Science Civil Engineering Fiber-reinforced Cementitious Composites (frcc) Self-healing (sh) Polypropylene Fiber Tensile Strength Concrete Cracking |
| Content Type | Text |
| Resource Type | Article |
