Next Article in Journal
Influence of Stem Diameter on Fiber Diameter and the Mechanical Properties of Technical Flax Fibers from Linseed Flax
Previous Article in Journal
Transcriptome Assembly of the Bast Fiber Crop, Ramie, Boehmeria nivea (L.) Gaud. (Urticaceae)
Previous Article in Special Issue
A Model for the Prediction of the Tensile Strength of Fiber-Reinforced Concrete Members, Before and After Cracking
Article Menu
Issue 1 (March) cover image

Export Article

Open AccessFeature PaperArticle
Fibers 2018, 6(1), 9; https://doi.org/10.3390/fib6010009

Effect of Polypropylene Fibers on Self-Healing and Dynamic Modulus of Elasticity Recovery of Fiber Reinforced Concrete

1
Department of Civil Engineering, Facility for Innovative Materials and Infrastructure Monitoring (FIMIM), University of Victoria, 3800 Finnerty Rd., Victoria, BC V8P 5C2, Canada
2
Research and Development Manager, Kryton International Inc., 1645 East Kent Ave N, Vancouver, BC V8P 5C2, Canada
*
Author to whom correspondence should be addressed.
Received: 20 December 2017 / Revised: 10 January 2018 / Accepted: 12 January 2018 / Published: 1 February 2018
View Full-Text   |   Download PDF [16052 KB, uploaded 1 February 2018]   |  

Abstract

This study aims to evaluate self-healing properties and recovered dynamic moduli of engineered polypropylene fiber reinforced concrete using non-destructive resonant frequency testing. Two types of polypropylene fibers (0.3% micro and 0.6% macro) and two curing conditions have been investigated: Water curing (at ~25 Celsius) and air curing. The Impact Resonance Method (IRM) has been conducted in both transverse and longitudinal modes on concrete cylinders prior/post crack induction and post healing of cracks. Specimens were pre-cracked at 14 days, obtaining values of crack width in the range of 0.10–0.50 mm. Addition of polypropylene fibers improved the dynamic response of concrete post-cracking by maintaining a fraction of the original resonant frequency and elastic properties. Macro fibers showed better improvement in crack bridging while micro fiber showed a significant recovery of the elastic properties. The results also indicated that air-cured Polypropylene Fiber Reinforced Concrete (PFRC) cylinders produced ~300 Hz lower resonant frequencies when compared to water-cured cylinders. The analyses showed that those specimens with micro fibers exhibited a higher recovery of dynamic elastic moduli. View Full-Text
Keywords: concrete self-healing; dynamic modulus of elasticity; fiber reinforced concrete; Impact Resonance Method; crack concrete self-healing; dynamic modulus of elasticity; fiber reinforced concrete; Impact Resonance Method; crack
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

El-Newihy, A.; Azarsa, P.; Gupta, R.; Biparva, A. Effect of Polypropylene Fibers on Self-Healing and Dynamic Modulus of Elasticity Recovery of Fiber Reinforced Concrete. Fibers 2018, 6, 9.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Fibers EISSN 2079-6439 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top