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Repair of heat-damaged RC shallow beams using advanced composites

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Abstract

Several repair techniques for restoring the structural capacity of heat-damaged high-strength reinforced concrete shallow beams using advanced composites are proposed. A series of 16 under-reinforced concrete hidden beams were cast, heated at 600°C for 3 h, repaired, and then tested under four point-loading. Tests were conducted to study the effectiveness of externally applied composite materials on increasing the flexural capacity of beams. The composites used include high strength fiber reinforced concrete jackets; ferrocement laminates; and high-strength fiber glass sheets. The beams repaired with steel and high performance polypropylene fiber reinforced concrete jackets regained up to 108 and 99% of the control beams’ ultimate load capacity, with a corresponding increase in stiffness of up to 104 and 98%, respectively. The beams repaired with fiber glass sheets and ferrocement meshes regained up to 126 and 99% of the control beams’ ultimate load capacity, with a corresponding increase in stiffness of up to 160 and 156%, respectively. Most of the beams repaired showed a typical flexural failure with very fine and well-distributed hairline cracks in the constant moment region.

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References

  1. El-hawary I, Ragab A, Abd el-azim A, Elibiari S (1996) Effect of fire on flexural behaviour of R.C. beams. Constr Build Mater 10:147–150

    Article  Google Scholar 

  2. Haddad R, Shannis I, (2004), Post-fire behavior of bond between high strength pozzolanic concrete and reinforcing steel. Constr Build Mater 18:425–435

    Article  Google Scholar 

  3. Chan Y, Luo X, Sun W (2000) Compressive strength and pore structure of high performance concrete after exposure to high temperature up to 800°C. Cement Concrete Res 30:247–251

    Article  Google Scholar 

  4. Chun S, Peng G, Chun K (1996) Comparison between high strength concrete and normal strength concrete subjected to high temperature. Mater Struct 29:616–619

    Article  Google Scholar 

  5. Zoldrens N, Malhotra V, Wilson H (1960) Effect of high temperatures on concretes incorporating different aggregates. Proc ASTM 60:1087–1108

    Google Scholar 

  6. Bazant Z, Kaplan M (1996) Concrete at high temperature: material properties and mathematical models, 1st edn. Longman Group Limited, England, ch. 2

    Google Scholar 

  7. Lin C, Chen S, Tang C (1995) Repair of fire-damaged reinforced concrete columns. ACI Struct J 92:406–411

    Google Scholar 

  8. Lange G (1980) Structural repair of fire damaged concrete. Concrete Int 2(9):27–29

    Google Scholar 

  9. Altin S, Anil O, Kara M (2005) Improving shear capacity of existing RC beams using external bonding of steel plates. Eng Struct 27:781–791

    Article  Google Scholar 

  10. Adhikary B, Mutsuyoshi H (2006) Shear strengthening of RC beams with web-bonded continuous steel plates. Constr Build Mater 20:296–307

    Article  Google Scholar 

  11. Paramasivam P, Lim C, Ong K (1998) Strengthening of RC beams with ferrocement laminates. Cement Concrete Comp 20:53–65

    Article  Google Scholar 

  12. Al-kubaisy M, Jumaat M (2000) Flexural behavior of reinforced concrete slabs with ferrocement tension zone cover. Constr Build Mater 14:245–252

    Article  Google Scholar 

  13. Nassif H, Najm H (2004) Experimental and analytical investigation of ferrocement–concrete composite beams. Cement Concrete Comp 26:787–796

    Google Scholar 

  14. Shannag M, Al-rousan R (1999) Shear strengthening of high-strength reinforced concrete beams using fibrous composite. Mag Concrete Res 56:419–428

    Article  Google Scholar 

  15. Krstulovic N, Al-shannag M (1999) Slurry infiltrated mat concrete (SIMCON)-based shear retrofit of reinforced concrete members. ACI Struct J 96:105–114

    Google Scholar 

  16. Naaman A, Reinhardt H, Fritz C (1993) Reinforced concrete beams with SIFCON matrix. ACI Struct J 89:1–15

    Google Scholar 

  17. Khalifa A, Nanni A (2002) Rehabilitation of rectangular simply supported RC beams with shear deficiencies using CFRP composites. Constr Build Mater 16:135–146

    Article  Google Scholar 

  18. Ashour A, El-refaie S, Garrity S (2004) Flexural strengthening of RC continuous beams using CFRP laminates. Cement Concrete Comp 26:765–775

    Google Scholar 

  19. Barros J, Fortes A (2005) Flexural strengthening of concrete beams with CFRP laminates bonded into slits. Cement Concret Comp 27:471–480

    Article  Google Scholar 

  20. ASTM standards (2005) Construction: concrete and aggregates, vol 04–05. American Society for Testing Materials, MI, USA

    Google Scholar 

  21. Shannag M (2002) High-performance cementitious grouts for structural repair. Cement Concrete Res 32:803–808

    Article  Google Scholar 

  22. ACI committee 318 (2005) Building code requirements for structural concrete (ACI 318M-05). American Concrete Institute, Mich., USA

    Google Scholar 

  23. Grace N, Singh S (2005) Durability evaluation of carbon fiber-reinforced polymer strengthened concrete beams: experimental study and design. ACI Struct J 102:40–53

    Google Scholar 

Download references

Acknowledgements

The authors would like to acknowledge the support received from the deanship of scientific research of University of Science and Technology at Jordan, and the assistance of the technicians at the engineering workshop and civil engineering laboratories.

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Authors and Affiliations

  1. Department of Civil Engineering, Jordan University of Science & Technology, Irbid, Jordan

    Rami H. Haddad & Alaa Moh’d

  2. Department of Civil Engineering, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia

    M. Jamal Shannag

Authors
  1. Rami H. Haddad
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  2. M. Jamal Shannag
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  3. Alaa Moh’d
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Correspondence to M. Jamal Shannag.

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Haddad, R.H., Shannag, M.J. & Moh’d, A. Repair of heat-damaged RC shallow beams using advanced composites. Mater Struct 41, 287–299 (2008). https://doi.org/10.1617/s11527-007-9238-9

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  • DOI: https://doi.org/10.1617/s11527-007-9238-9

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