Effect of Self-Compacting Concrete and Aggregate Size on Anchorage Performance at Highly Congested Reinforcement Regions
At highly congested reinforcement regions, which is common at beam-column joint area, clear spacing between parallel bars becomes less than maximum normal aggregate size (20mm) which has not been addressed in any design code and specifications. Limited clear spacing between parallel bars (herein after thin cover) is one of the causes which affect anchorage performance. In this study, an experimental investigation was carried out to understand anchorage performance of reinforcement in Self-Compacting Concrete (SCC) and Normal Concrete (NC) at highly congested regions under uni-axial tensile loading. Column bar was pullout whereas; beam bars were offset from column reinforcement creating thin cover as per site condition. Two different sizes of coarse aggregate were used for NC (20mm and 10mm). Strain gauges were also installed along the bar in some specimens to understand the internal stress mechanism. Test results reveal that anchorage performance is affected at highly congested reinforcement region in NC with maximum aggregate size 20mm whereas; SCC and Small Aggregate (10mm) gives better structural performance.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1087840Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 3050
 H. Okamura and M. Ouchi, “Self-Compacting Concrete,” Journal of Advanced Concrete Technology, JCI, vol. 1, issue 1, pp. 5-15, 2003.
 K. Yoshitake, H. Orgura and A. Ogawa, “The effect of vertical and horizontal position of reinforcement for bond condition in beam-column joint,” Proceedings of 65th JSCE Annual Conference, pp. 1109-1110, 2010. (in Japanese).
 G. Russo and F. Romano, “Cracking response of RC members subjected to uniaxial tension,” Journal of Structural Engineering ASCE, vol. 118, No.5, pp. 1172-1190, 1992.
 B.M. Luccioni, D.E. Lopez and R.F. Danesi, “Bond-Slip in Reinforced Concrete Elements,” Journal of Structural Engineering ASCE, vol. 131, pp. 1690-1698, 2005.
 J. Pedziwiatr, “Influence of Internal cracks on bond on cracked concrete structures,” Archives of Civil and Mechanical Engineering, vol. 8, pp. 91-105, 2008.
 P.G. Gambarova and G. P. R.B. Zasso, “Steel-to-Concrete bond after concrete splitting: tests results,” Materials and Structures, vol. 22, issue 1, pp. 35-47, 1989.
 Y. Goto, “Cracks formed in concrete around tension bars,” American Concrete Institute (ACI) Journal, vol. 68, issue 68, pp. 244-251, 1971.
 A. Azizinamini, M. Chisala and S.K. Ghosh, “Tension development length of reinforcing bars embedded in high-strength concrete,” Enginering Structures, vol. 17, pp. 512-522, 1995.
 W. Yeih, R. Huang, J.J. Chang, and C.C. Yang, “A pullout Test for Determining Interface properties between rebar and concrete,” Advanced Cement Based Materials, Elsevier, vol.5, pp. 57-65, 1997.
 B.S. Hamad and M. Y. Mansour, “bond strength of non-contact tension lap splices,” American Concrete Institute (ACI) Journal, vol. 93, pp. 316-326, 1996.
 K. Turk, A. Benli and Y. Calayir, “Bond strength of tension lap-splice in full scale self-compacting concrete beams,” Turkish J. Eng. Env. Sci., vol. 32, pp. 377-386, 2008.
 S. J Chamberlin, “Spacing of spliced bars in beams,” American Concrete Institute (ACI) Journal, vol. 54, pp. 689-697, 1958.
 S.J. Chamberlin, “Spacing of spliced bars in tension pullout,” American Concrete Institute (ACI) Journal, vol. 49, pp. 261-274, 1952.
 K.H. Khayat, “Workability, Testing, and Performance of Self-Consolidating Concrete,” American Concrete Institute (ACI) Journal, vol. 96, issue 3, pp. 346-354, 1999.
 R. Kumar, R. Kumar and N. Kumar, “In situ performance of Self-Compacting Concrete in T-Beams,” Journal of Materials in Civil Engineering, ASCE, vol. 21, pp. 103-109, 2009.
 A. Castel, T. Vidal, K. Viriyametanont and R. Francois, “Effect of Reinforcing Bar Orientation and Location on Bond with Self-Consolidating Concrete,” American Concrete Institute (ACI) Journal, vol. 103, issue 4, pp. 559-567, 2006.
 M. Valcuende and C. Parra, “Bond behavior of reinforcement in self-compacting concretes,” Construction and Building Materials, Elsevier, vol. 23, issue 1, pp. 162-170, 2009.
 Fernando Menezes de Almeida Filho , Mounir K. El Debs and Ana Lucia h.C. El Debs, “Bond Slip behavior of self-compacting concrete and Normal Concrete using pullout and beam tests,” Materials and Structures, vol. 41, pp. 1073-1089, 2008.
 A. Forougli-Asl, S. Dilmaghami and H. Famili, “Bond Strength of Reinforcement Steel in Self-Compacting Concrete,” International Journal of Civil Engineering, vol. 6, issue 1, pp. 24-33, 2008.
 T. J. Looney, M. Arezoumandi, J. S. Volz and John J. Myers, “An Experimental Study on Bond Strength of Reinforcing Steel in Self-Consolidating Concrete,” International Journal of Concrete Structures and Materials, 2012.
 Y Inoue and K. Nagai, “Numerical Simulation of Fracture Pattern and Bond Performance of Anchorage in Reinforced Concrete,” Proceedings of Twelfth East Asia-Pacific Conference on Structural Engineering 12 (EASEC12), 2011 (in CD-ROM).
 M. Harajili, B. Hamad and K. Karam, “Bond-Slip response of reinforcing bars embedded in Plain and Fiber Concrete,” Journal of Materials in Civil Engineering, vol. 14, issue 6, pp. 503-511, 2002
 JSCE Guidelines for Concrete, “Standard Specifications for Concrete Structures-Design”, vol. 15, 2007.
 JIS Test Methods and Specifications, “Standard Specifications for Concrete Structures, 2005.
 H. Okamura, K. Maekawa, and K. Ozawa, “High performance concrete,” 1st ed., Tokyo: Gihou-do, 1993(In Japanese).