Investigation of bond between lap-spliced steel bar and self-compacting concrete: The role of silica fume

In this study, normal concrete (NC) and four types of self-compacting concrete (SCC), in which cement was partially replaced by 5%, 10%, 15%, and 20% of silica fume (SF), were used to evaluate the effect of SF content on the bond strength of tension lap-spliced bars embedded in NC and SCC specimens. Therefore, 15 full-scale beam specimens (2000 � 300 � 200 mm 3 ) were tested and 20 mm reinforcing bars were used with a 300-mm splice length as tension rein- forcement. Each beam was designed with bars spliced in a constant moment region at midspan. It was found that the bond strength of the reinforcement embedded in SCC beams was higher than that of the reinforcement in NC beams, whilst the bond strength increased with increase in the replacement of cement by SF from 5% to 10%. Moreover, the beam speci- mens produced from SCC containing 5% SF had the highest normalized bond strength of 1.07 followed by SCC beams with 10% SF, 15% SF, NC beams, and 20% SF.

[1]  Z. C. Ulucan,et al.  Effect of mineral admixtures on the correlation between ultrasonic velocity and compressive strength for self-compacting concrete , 2008 .

[2]  S. Yazıcıoğlu,et al.  Capillary water absorption of self-compacting concrete under different curing conditions , 2007 .

[3]  S. Yazıcıoğlu,et al.  Effect of curing conditions on the engineering properties of self-compacting concrete , 2006 .

[4]  S. Çalışkan,et al.  Influence of loading condition and reinforcement size on the concrete/reinforcement bond strength , 2005 .

[5]  Kazim Turk,et al.  Bond strength of reinforcement in splices in beams , 2003 .

[6]  Y. Chan,et al.  Development of Bond Strength of Reinforcement Steel in Self-Consolidating Concrete , 2003 .

[7]  Sinan Caliskan,et al.  Aggregate/mortar interface: influence of silica fume at the micro- and macro-level , 2003 .

[8]  Turan Özturan,et al.  FACTORS AFFECTING ANCHORAGE BOND STRENGTH IN HIGH-PERFORMANCE CONCRETE , 2000 .

[9]  Bilal S. Hamad,et al.  BOND STRENGTH OF REINFORCEMENT IN HIGH-PERFORMANCE CONCRETE: THE ROLE OF SILICA FUME, CASTING POSITION, AND SUPERPLASTICIZER DOSAGE , 1998 .

[10]  T. Nomura,et al.  Highly-Flowable Steel Fiber-Reinforced Concrete Containing Fly Ash , 1998, "SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete".

[11]  B. V. Rangan,et al.  Bond between Normal Strength and High-Strength Concrete (HSC) and Reinforcing Bars in Splices in Beams , 1998 .

[12]  David Darwin,et al.  DEVELOPMENT LENGTH CRITERIA FOR CONVENTIONAL AND HIGH RELATIVE RIB AREA REINFORCING BARS , 1996 .

[13]  Atorod Azizinamini,et al.  Bond Performance of Reinforcing Bars Embedded in High-Strength Concrete , 1993 .

[14]  F De Larrard,et al.  EFFECT OF BAR DIAMETER ON THE BOND STRENGTH OF PASSIVE REINFORCEMENT IN HIGH-PERFORMANCE CONCRETE , 1993 .

[15]  J. Dewar.  Properties of hardened concrete , 1992 .

[16]  Ahmed Ezeldin,et al.  Bond behavior of normal and high-strength fiber reinforced concrete , 1989 .

[17]  Jack P. Moehle,et al.  "BUILDING CODE REQUIREMENTS FOR STRUCTURAL CONCRETE (ACI 318-11) AND COMMENTARY" , 2011 .

[18]  M. Valcuende,et al.  Bond behaviour of reinforcement in self-compacting concretes , 2009 .

[19]  P. Hewlett,et al.  Lea's chemistry of cement and concrete , 2001 .

[20]  A. Yahia,et al.  Effect of rheological parameters on self-compactability of concrete containing various mineral admixtures , 1999 .

[21]  Shyh-Jiann Hwang,et al.  Tensile bond strengths of deformed bars of high-strength concrete , 1996 .

[22]  D. Campbell-allen.  Properties of hardened concrete , 1992 .

[23]  F. Lea.  The chemistry of cement and concrete , 1970 .