Computers and Concrete

  • 제21권3호
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  • Pages.249-259
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  • 2018
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
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Pull-out behaviour of recycled aggregate based self compacting concrete

  • 투고 : 2017.07.18
  • 심사 : 2017.11.15
  • 발행 : 2018.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

The use of recycled aggregate in concrete is gaining much attention due to the growing need for sustainability in construction. In the present study, Self Compacting Concrete (SCC) is made using both natural and recycled aggregate (crushed recycled concrete aggregate from building demolished waste) and performance of recycled aggregate based SCC for the bond behaviour of reinforcement is evaluated. The major factors that influence the bond like concrete compressive strength (Mix-A, B and C), diameter of bar ($D_b=10$, 12 and 16 mm) and embedment length of bar ($L_d=2.5Db$, $5D_b$ and full depth of specimen) are the parameters considered in the present study in addition to type of aggregates (natural and recycled aggregates). The mix proportions of Natural Aggregate SCC (NASCC) are arrived based on the specifications of IS 10262. The mix proportions also satisfy the guidelines of EFNARC. In case of Recycled Aggregate SCC (RASCC), both the natural coarse and fine aggregates are replaced 100% by volume with that of recycled aggregates. These mixes are also evaluated for fresh properties as per EFNARC. The hardened properties like compressive strength, split tensile strength and flexural strength are also determined. The pull-out test is conducted as per the specifications of IS 2770 (Part-1) for determining the bond strength of reinforcement. Bond stress versus slip curves were plotted and a typical comparison of RASCC is made with NASCC. The fracture energy i.e., area under the bond stress slip curve is determined. With the use of recycled aggregates, reduction in maximum bond stress is noticed whereas, the normalised maximum bond stress is higher in case of recycled aggregates. Based on the experimental results, regression analysis is conducted and an equation is proposed to predict the maximum bond stress of RASCC. The equation is in good agreement with the experimental results. The available models in the literature are made use to predict the maximum bond stress and compare the present results.

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참고문헌

  1. ACI Committee 408 (2003), Bond and Development of Straight Reinforcing Bars in Tension (ACI 408R-03), American Concrete Institute, Farmington Hills, MI, USA.
  2. Al-Jahdali, F.A., Wafa, F.F. and Shihata, S.A. (1994), "Development length for straight deformed bars in highstrength concrete", ACI Spec. Publ., 149, 507-522.
  3. Australian Standard (1994), AS 3600-Australian Standard for Concrete Structures, North Sydney, Australia.
  4. Butler, L., West, J.S. and Tighe, S.L. (2011), "The effect of recycled concrete aggregate properties on the bond strength between RCA concrete and steel reinforcement", Cement Concrete Res., 41(10), 1037-1049. https://doi.org/10.1016/j.cemconres.2011.06.004
  5. CEB-FIP (2012), Model Code 2010-Final draft, Volume 1, Thomas Telford, London.
  6. Chapman, R.A. and Shah, S.P. (1987), "Early-age bond strength in reinforced concrete", ACI Mater. J., 84(6), 501-510.
  7. Darwin, D., McCane, S.L., Idun, EK, and Schoenekase, S.P. (1992), "Development length criteria: Bars not confined by transverse reinforcement", ACI Struct. J., 89(6), 709-720.
  8. De Almeida Filho, F.M., Mounir, K. and EI Debs, A.L.H. (2008), "Bond-slip behavior of self-compacting concrete and vibrated concrete using pull-out and beam tests", Mater. Struct., 41(6), 1073-1089. https://doi.org/10.1617/s11527-007-9307-0
  9. De Brito, J. and Saikia, N. (2012), Recycled Aggregate in Concrete -Use of Industrial, Construction and Demolition Waste, Springer Science & Business Media, London.
  10. EFNARC (2005), The European Guidelines for Self Compacting Concrete - Specification, Production and Use, http://www.efnarc.org/pdf/SCCGuidelinesMay2005.pdf.
  11. Esfahani, M.R. and Rangan, B.V. (1998), "Bond between normal strength and High-Strength Concrete (HSC) and reinforcing bars in splices in beams", ACI Struct. J., 95(3), 272-280.
  12. Foroughi-Asl, A., Dilmaghani, S. and Famili, H. (2008), "Bond strength of reinforcement steel in Self-Compacting Concrete", Int. J. Civil Eng., 6(1), 24-33.
  13. Guerra, M., Ceia, F., De Brito, J. and Julio, E. (2014), "Anchorage of steel rebars to recycled aggregate concrete", Constr. Build. Mater., 72, 113-123. https://doi.org/10.1016/j.conbuildmat.2014.08.081
  14. Harajli, M.H. (1994), "Development/splice strength of reinforcing bars embedded in plain and fiber reinforced concrete", ACI Struct. J., 91(5), 511-520.
  15. Helincks, P., Boel, V., De Corte, W., De Schutter, G. and Desnerck, P. (2013), "Structural behaviour of powder-type self-compacting concrete Bond performance and shear capacity", Eng. Struct., 48, 121-132. https://doi.org/10.1016/j.engstruct.2012.08.035
  16. IS: 10262 (2009), Indian Standard Concrete Mix Proportioning-Guidelines, Bureau of Indian Standards, New Delhi.
  17. IS: 12089 (1987), Indian Standard Specification for Granulated Slag for the Manufacture of Portland Slag Cement, Bureau of Indian Standards, New Delhi. (reaffirmed 2004)
  18. IS: 12269 (2013), Indian Standard Ordinary Portland Cement, 53 Grade-Specification, Bureau of Indian Standards, New Delhi.
  19. IS: 1786 (2008), Indian Standard High Strength Deformed Steel Bars and Wires for Concrete Reinforcement-Specification, Bureau of Indian Standards, New Delhi.
  20. IS: 2770 (Part-1) (1967), Indian Standard Methods of Testing Bond in Reinforced Concrete, Part 1: Pull-out Test, Bureau of Indian Standards, New Delhi. (reaffirmed 2007)
  21. IS: 3812 (Part-1) (2003), Indian Standard Pulverized Fuel Ash-Specification, Part-1: For Use as Pozzolana in Cement, Cement Mortar and Concrete, Bureau of Indian Standards, New Delhi.
  22. IS: 383 (1970), Indian Standard Specification for Coarse and Fine Aggregates from Natural Sources for Concrete, Bureau of Indian Standards, New Delhi. (reaffirmed 2002)
  23. IS: 516 (1959), Indian Standard Methods of Tests for Strength of Concrete, Bureau of Indian Standards, New Delhi. (reaffirmed 2004)
  24. Kemp, E.L. (1986), "Bond in reinforced concrete: Behaviour and design criteria", ACI J. Proc., 83(1), 50-57.
  25. Kim, S.W. and Yun, H.D. (2013), "Influence of recycled coarse aggregates on the bond behaviour of deformed bars in concrete", Eng. Struct., 48, 133-143. https://doi.org/10.1016/j.engstruct.2012.10.009
  26. Kim, S.W. and Yun, H.D. (2014), "Evaluation of the bond behaviour of steel reinforcing bars in recycled fine aggregate concrete", Cement Concrete Compos., 46, 8-18. https://doi.org/10.1016/j.cemconcomp.2013.10.013
  27. Liang, F., Hu, M.H., Gu, L.S. and Xue, K.X. (2015), "Bond behaviour between high volume fly ash concrete and steel rebars", Comput. Concrete, 19(6), 625-630. https://doi.org/10.12989/CAC.2017.19.6.625
  28. Orangun, C.O., Jirsa, J.O. and Breen, J.E. (1977), "Reevaluation of test data on development length and splices", ACI J., 74(3), 114-122.
  29. Pop, I., De Schutter, G., Desnerck, P. and Onet, T. (2013), "Bond between powder type self-compacting concrete and steel reinforcement", Constr. Build. Mater., 41, 824-833. https://doi.org/10.1016/j.conbuildmat.2012.12.029
  30. Prince, M.J.R. and Singh, B. (2013), "Bond behaviour of deformed steel bars embedded in recycled aggregate concrete", Constr. Build. Mater., 49, 852-862. https://doi.org/10.1016/j.conbuildmat.2013.08.031
  31. Prince, M.J.R., Gaurav, G. and Singh, B. (2017), "Splice strength of deformed steel bars embedded in recycled aggregate concrete", Struct., 10, 130-138. https://doi.org/10.1016/j.istruc.2017.03.001
  32. Rio Summit (1992), "Rio declaration on environment and development", United Nations Conference on Environment and Development, Rio de Janeiro, Brazil.
  33. Sfikas, I.P. and Trezos, K.G. (2013), "Effect of composition variations on bond properties of Self-Compacting Concrete specimens", Constr. Build. Mater., 41, 252-262. https://doi.org/10.1016/j.conbuildmat.2012.11.094
  34. Tang, C.W. (2015), "Local bond stress-slip behavior of reinforcing bars embedded in lightweight aggregate concrete", Comput. Concrete, 16(3), 449-466. https://doi.org/10.12989/cac.2015.16.3.449
  35. Tang, C.W. (2017), "Uniaxial bond stress-slip behaviour of reinforcing bars embedded in lightweight aggregate concrete", Struct. Eng. Mech., 62(5), 651-661. https://doi.org/10.12989/SEM.2017.62.5.651
  36. UN Report (1987), "Our common future, Chapter 2: towards sustainable development", Report of the World Commission on Environment and Development. http://www.undocuments.net/ocf-02.htm.
  37. Valcuende, M. and Parra, C. (2009), "Bond behaviour of reinforcement in self-compacting concretes", Constr. Build. Mater., 23(1), 162-170. https://doi.org/10.1016/j.conbuildmat.2008.01.007
  38. Wang, H.L. (2016), "Steel-concrete bond behaviour of selfcompacting concrete with recycled aggregates", Mag. Concrete Res., 68(13), 678-691. https://doi.org/10.1680/jmacr.15.00143
  39. World Summit (2002), "Johannesburg declaration on sustainable development", World Summit on Sustainable Development, Johannesburg, South Africa. http://www.undocuments.net/jburgdec.htm.
  40. Xiao, J. and Falkner, H. (2007), "Bond behaviour between recycled aggregate concrete and steel rebars", Constr. Build. Mater., 21(2), 395-401. https://doi.org/10.1016/j.conbuildmat.2005.08.008