Pullout Behavior of High-Strength Steel Fibers Embedded in Ultra-High-Performance Concrete

Wille, Kay; Naaman, Antoine E.
July 2012
ACI Materials Journal;Jul/Aug2012, Vol. 109 Issue 4, p479
Academic Journal
Research on the pullout behavior of single steel fibers embedded in ultra-high-performance concretes (UHPCs) was conducted to investigate the bond properties of straight and deformed steel fibers. The main research objective was to compare the physicochemical interfacial bond properties between brass-coated straight steel fibers and the ultra-high-performance cementitious matrix with the mechanical bond properties of hooked-end and twisted steel fibers embedded in the same matrix. The results show that the enhanced bond properties provided by the ultra-high-performance cementitious matrix led to the failure of fibers having a high mechanical bond component. Tailoring of the fiber strength and mechanical bond to the matrix strength is needed for optimal pullout behavior. It is observed that the equivalent bond strength of deformed fibers embedded in UHPC reaches up to 47 MPa (6.8 ksi)--that is, almost five times the equivalent bond strength of straight fibers (10 MPa [1.4 ksi]) embedded in the same matrix. Furthermore, the equivalent bond strength of straight steel fibers, which are commonly used in ultra-high-performance fiber-reinforced concrete (UHP-FRC), can be doubled to a value exceeding 20 MPa (2.9 ksi) by optimizing the UHPC matrix through composition and particle size distribution, leading to an atypical pullout load-slip-hardening behavior. Such behavior is desirable for high tensile strength, high-energy-absorbing, strain-hardening UHP-FRC.


Related Articles

  • ACCELERATED PROPERTIES OF STEEL FIBRE REINFORCED CONCRETE CONTAINING FINER SAND. Sounthararajan, V. M.; Sivakumar, A. // Journal of Engineering & Applied Sciences;Jan2013, Vol. 8 Issue 1, p57 

    The present study focuses on the influence of finer sand for producing the accelerated rate of hardening at early ages in steel fibre reinforced concrete. Experimental tests were conducted on the concrete mixtures containing different percentage of finer sand (0, 10, 20 and 30%) and the...

  • Fresh and Hardened Properties of Self-Consolidating Fiber-Reinforced Concrete. Dhonde, Hemant B.; Mo, Y. L.; Hsu, Thomas T. C.; Vogel, John // ACI Materials Journal;Sep/Oct2007, Vol. 104 Issue 5, p491 

    The article offers information on a study that developed self-consolidating fiber-reinforced concrete (SCFRC). The study developed SCFRC to improve the workability of concrete, which was lacking in traditional fiber-reinforced concrete. It discovered that traditional fibrous concrete mixtures...

  • Strength Modeling of High-Strength Concrete with Hybrid Fibre Reinforcement. Ravichandran, A.; Suguna, K.; Ragunath, P. N. // American Journal of Applied Sciences;2008, Vol. 6 Issue 2, p219 

    The low tensile strength and limited ductility, the unavoidable deficiency, of concrete can be overcome by the addition of fibres. High strength concrete (HSC) of 60 MPa containing hybrid fibres, combination of steel and polyolefin fibres, at different volume fraction of 0.5, 1.0, 1.5 and 2.0%...

  • Compressive Behavior of Ultra-High-Performance Fiber-Reinforced Concrete. Graybeal, Benjamin A. // ACI Materials Journal;Mar/Apr2007, Vol. 104 Issue 2, p146 

    The article presents an experimental program that was performed to determine the uniaxial compressive behavior of an ultra-high performance fiber-reinforced concrete (UHPFRC). Tests were conducted on cylinders in compression to determine the overall stress-strain behavior, strain capacity,...

  • Determination of Mechanical Properties of Hybrid Steel-Nylon Fiber Reinforced Concrete. Adeen, Mazin Burhan; Al-Attar, Alya'a Abbas; Ra'ouf, Sa'ad Mahmoud // Modern Applied Science;Dec2010, Vol. 4 Issue 12, p97 

    This study aims to characterize and quantify the mechanical properties of hybrid steel-nylon fiber reinforced concrete. In order to achieve and verify that, 0.5%, 1% and 1.5% fiber percentage by volume of concrete are used in this study with five different mixes of 100-0%, 70-30%, 50-50%, 30-70%...

  • Effectiveness of Steel Fiber as Minimum Shear Reinforcement. Susetyo, Jimmy; Gauvreau, Paul; Vecchio, Frank J. // ACI Structural Journal;JulAug2011, Vol. 108 Issue 4, p488 

    Ten 35 x 35 x 2.75 in. (890 x 890 x 70 mm) concrete panels were tested under in-plane pure-shear monotonic loading conditions to evaluate the effectiveness of steel fibers in meeting minimum shear reinforcement requirements for concrete elements. The test results indicate that concrete elements...

  • FARKLI KARIÅžIM ORANLARINA SAHÄ°P POLÄ°PROPÄ°LEN LÄ°FLÄ° BETONLARIN DAYANIM VE DURABÄ°LÄ°TE ÖZELLÄ°KLERÄ°. Açıkgenç, Merve; Arazsu, Ufuk; Alyamaç, Kürşat Esat // SDU International Journal of Technological Science;Dec2012, Vol. 4 Issue 3, p41 

    The concrete is a brittle material which has low tensile strength and tensile strain capacity. These weak points of concrete can be fixed by using fibers made of different materials with high technical specifications in concrete. In this study, polypropylene fibers were used in concrete by...

  • Behavior of Steel Fiber-Reinforced Concrete Deep Beams with Large Opening. Sahoo, Dipti R.; Flores, Carlos A.; Chao, Shih-Ho // ACI Structural Journal;Mar/Apr2012, Vol. 109 Issue 2, p193 

    Large openings in reinforced concrete (RC) deep beams generally interrupt the load transfer by concrete struts and cause a sharp decrease in strength and serviceability. The reinforcement detailing of these deep beams based on strut-and-tie models (STMs) can be complex and, very often, these...

  • Tensile Behavior of Post-Installed Anchors in Plain and Steel Fiber-Reinforced Normal- and High-Strength Concretes. Gesoglu, Mehmet; Özturan, Turan; Özel, Melda; Güneyisi, Erhan // ACI Structural Journal;Mar/Apr2005, Vol. 102 Issue 2, p224 

    This paper addresses the load-deflection behavior of adhesive and grouted anchors embedded in both plain and steel fiber-reinforced normal- and high-strength concretes. Both 12 and 16 mm-diameter adhesive anchors were tested at embedment depths ranging from 40 to 160 mm, while grouted anchors of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics