Next Article in Journal
A Brief Review of New Fiber Microsphere Geometries
Next Article in Special Issue
Experimental Investigation of the Physical and Mechanical Properties of Sisal Fiber-Reinforced Concrete
Previous Article in Journal
Developing Novel Temperature Sensing Garments for Health Monitoring Applications
Previous Article in Special Issue
Restrained Shrinkage Cracking of Fiber-Reinforced High-Strength Concrete
Open AccessEditor’s ChoiceArticle

Influence of Steel and Macro-Synthetic Fibers on Concrete Properties

Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, 25123 Brescia, Italy
Civil Engineering and Engineering Mechanics Department, Columbia University, New York, NY 10027, USA
Author to whom correspondence should be addressed.
Fibers 2018, 6(3), 47;
Received: 5 June 2018 / Revised: 25 June 2018 / Accepted: 29 June 2018 / Published: 11 July 2018
(This article belongs to the Special Issue Recent Advancements in Fiber Reinforced Concrete And its Applications)
Fiber addition has become one of the most prevalent methods for enhancing the tensile behavior of concrete. Fibers reduce cracking phenomena and improve the energy absorption capacity of the structure. On the other hand, the introduction of fibers can introduce a negative impact on concrete workability, whose loss is influenced by different parameters (among which are fiber content and fiber type). In this context, an exploratory study on the influence of steel (high stiffness) and macro-synthetic (low stiffness) fibers on the fresh properties of concrete was carried out, considering workability and air content, as well as resultant mechanical performance. Four fiber types at two volume fractions (0.5% and 1.0%) were studied in two base concretes with different water-to-cement ratios (0.45 and 0.50) by using the slump test, DIN flow table test and air content meter. An additional parameter for the DIN flow table test is proposed herein to quantify the potential preferential flow direction caused by fiber orientation and entanglement. Air meter results showed that the fibers caused only a slight increase in concrete air content; this agreed well with the results of mechanical testing, which showed no apparent effect on measured compressive strength. In addition, it was captured that, for a given fiber volume fraction, steel fibers more adversely affected Fiber Reinforced Concrete (FRC) workability as compared to polypropylene ones, while the opposite result was obtained considering FRC toughness. View Full-Text
Keywords: workability; air content; steel fibers; polypropylene fibers; fiber reinforced concrete workability; air content; steel fibers; polypropylene fibers; fiber reinforced concrete
Show Figures

Figure 1

MDPI and ACS Style

Guerini, V.; Conforti, A.; Plizzari, G.; Kawashima, S. Influence of Steel and Macro-Synthetic Fibers on Concrete Properties. Fibers 2018, 6, 47.

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.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop