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 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 ex...
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doaj-841184a0e175420cbe8b59c3ee039a632021-05-31T23:22:59ZengMDPI AGJournal of Composites Science2504-477X2021-05-01512212210.3390/jcs5050122Self-Healing Potential and Post-Cracking Tensile Behavior of Polypropylene Fiber-Reinforced Cementitious CompositesMohit Garg0Pejman Azarsa1Rishi Gupta2Facility for Innovative Materials and Infrastructure Monitoring (FIMIM), Department of Civil Engineering, University of Victoria, Victoria, BC V8P 5C2, CanadaFacility for Innovative Materials and Infrastructure Monitoring (FIMIM), Department of Civil Engineering, University of Victoria, Victoria, BC V8P 5C2, CanadaDepartment of Civil Engineering, University of Victoria, Victoria, BC V8P 5C2, CanadaThe 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.https://www.mdpi.com/2504-477X/5/5/122fiber-reinforced cementitious composites (FRCC)self-healing (SH)polypropylene fibertensile strengthconcrete cracking |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mohit Garg Pejman Azarsa Rishi Gupta |
spellingShingle |
Mohit Garg Pejman Azarsa Rishi Gupta Self-Healing Potential and Post-Cracking Tensile Behavior of Polypropylene Fiber-Reinforced Cementitious Composites Journal of Composites Science fiber-reinforced cementitious composites (FRCC) self-healing (SH) polypropylene fiber tensile strength concrete cracking |
author_facet |
Mohit Garg Pejman Azarsa Rishi Gupta |
author_sort |
Mohit Garg |
title |
Self-Healing Potential and Post-Cracking Tensile Behavior of Polypropylene Fiber-Reinforced Cementitious Composites |
title_short |
Self-Healing Potential and Post-Cracking Tensile Behavior of Polypropylene Fiber-Reinforced Cementitious Composites |
title_full |
Self-Healing Potential and Post-Cracking Tensile Behavior of Polypropylene Fiber-Reinforced Cementitious Composites |
title_fullStr |
Self-Healing Potential and Post-Cracking Tensile Behavior of Polypropylene Fiber-Reinforced Cementitious Composites |
title_full_unstemmed |
Self-Healing Potential and Post-Cracking Tensile Behavior of Polypropylene Fiber-Reinforced Cementitious Composites |
title_sort |
self-healing potential and post-cracking tensile behavior of polypropylene fiber-reinforced cementitious composites |
publisher |
MDPI AG |
series |
Journal of Composites Science |
issn |
2504-477X |
publishDate |
2021-05-01 |
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. |
topic |
fiber-reinforced cementitious composites (FRCC) self-healing (SH) polypropylene fiber tensile strength concrete cracking |
url |
https://www.mdpi.com/2504-477X/5/5/122 |
work_keys_str_mv |
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