Impact of natural weathering on medium-term self-healing performance of fiber reinforced cementitious composites with intrinsic crack-width control capability

2017 ◽  
Vol 80 ◽  
pp. 200-209 ◽  
Author(s):  
Chung-Chan Hung ◽  
Yen-Fang Su ◽  
Hsuan-Hui Hung
Keyword(s):  
Crack Width ◽  
Natural Weathering ◽  
Cementitious Composites ◽  
Self Healing ◽  
Fiber Reinforced ◽  
Medium Term ◽  
Control Capability ◽  
Fiber Reinforced Cementitious Composites

scholarly journals Self-Healing Capability of Fiber-Reinforced Cementitious Composites for Recovery of Watertightness and Mechanical Properties

Materials ◽  
2014 ◽  
Vol 7 (3) ◽  
pp. 2141-2154 ◽  
Author(s):  
Tomoya Nishiwaki ◽  
Sukmin Kwon ◽  
Daisuke Homma ◽  
Makoto Yamada ◽  
Hirozo Mihashi
Keyword(s):  
Mechanical Properties ◽  
Cementitious Composites ◽  
Self Healing ◽  
Fiber Reinforced ◽  
Fiber Reinforced Cementitious Composites

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

2021 ◽  
Vol 5 (5) ◽  
pp. 122
Author(s):  
Mohit Garg ◽  
Pejman Azarsa ◽  
Rishi Gupta
Keyword(s):  
Volume Fraction ◽  
Peak Load ◽  
Polypropylene Fiber ◽  
Cementitious Composites ◽  
Self Healing ◽  
Fiber Reinforced ◽  
Cracking Behavior ◽  
Micro Scale ◽  
Macro Scale ◽  
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 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.

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