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Effect of Locally Sourced Pozzolan on Corrosion Resistance of Steel in Reinforced Concrete Beams

  • Chinh Van NguyenEmail author
  • Paul Lambert
  • Vu Ngoc Bui
Research paper
  • 23 Downloads

Abstract

Corrosion of the reinforcing steel in concrete continues to be a major cause of damage to reinforced concrete (RC) structures. Eight reinforced concrete beams with dimensions of 100 mm by 150 mm in cross-section and 1000 mm in length were divided into two groups. For each group, locally sourced fly ash was used to partially replace the ordinary Portland cement in the proportions of 0% (control samples), 10%, 20% and 40% by weight. The reinforcing steel bars were weighed and then, after casting and curing, were subjected to accelerated corrosion by employing an anodic impressed voltage at 10 V DC (Group 1) and 20 V DC (Group 2) for 377 h (16 days). The beams were then flexurally tested and the reinforcing steel bars were removed, cleaned and re-weighed to determine the extent of corrosion. The results demonstrate that the Vietnamese-sourced fly ash significantly increases the corrosion resistance of the reinforcing steel with higher fly ash replacement providing better corrosion resistance. The flexural strength of the pre-corroded reinforced concrete beams with partial cement replacement by fly ash is increased by up to 16% for Group 1 and 120% for Group 2. The fly ash was also found to increase the ductility of the pre-corroded reinforced concrete beams.

Keywords

Concrete Fly ash Corrosion Degree of corrosion Flexural strength Anodic impressed voltage 

Notes

Acknowledgements

The authors would like to express their gratitude to The University of Danang, University of Science and Technology, Vietnam for funding and supports throughout this research.

Funding

This work was supported by The University of Danang, University of Science and Technology, code number of Project: T2019-02-13.

Compliance with ethical standards

Conflict of Interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

References

  1. 1.
    Broomfield JP (2006) Corrosion of steel in concrete: understanding, investigation and repair, 2nd edn. Taylor and Francis, LondonGoogle Scholar
  2. 2.
    Rodriguez J, Ortega LM, Casal J (1997) Load carrying capacity of concrete structures with corroded reinforcement. Constr Build Mater 11(4):239–248CrossRefGoogle Scholar
  3. 3.
    Okada K, Kobayashi K, Miyagawa T (1988) Influence of longitudinal cracking due to reinforcement corrosion on characteristics of reinforced concrete members. ACI Struct J 85(2):134–140Google Scholar
  4. 4.
    Ahmad S (2003) Reinforcement corrosion in concrete structures, its monitoring and service life prediction—a review. Cement Concr Compos 25:459–471CrossRefGoogle Scholar
  5. 5.
    Mangat PS, Elgarf MS (1999) Flexural strength of concrete beams with corroding reinforcement. ACI Struct J 96(1):149–158Google Scholar
  6. 6.
    Al-Sulaimani GJ, Kaleemullah M, Basunbul IA (1990) Influence of corrosion and cracking on the bond behaviour and strength of reinforced concrete members. ACI Struct J 87(2):220–231Google Scholar
  7. 7.
    Kyong YY, Eun KK (2005) An experimental study on corrosion resistance of concrete with ground granulate blast-furnace slag. Cem Concr Res 35:1391–1399CrossRefGoogle Scholar
  8. 8.
    Gjorv OE (1995) Effect of condensed silica fume on steel corrosion in Concrete. ACI Mater J 92(6):591–598Google Scholar
  9. 9.
    Cao HT, Sirivivatnanon V (1991) Corrosion of steel in concrete with and without silica fume. Cem Concr Res 21:316–324CrossRefGoogle Scholar
  10. 10.
    Hossain KMA, Lachemi M (2004) Corrosion resistance and chloride diffusivity of volcanic ash blended cement mortar. Cem Concr Res 34:695–702CrossRefGoogle Scholar
  11. 11.
    Saraswathy V, Muralidharan S, Thangavel K, Srinivasan S (2003) Influence of activated fly ash on corrosion-resistance and strength of concrete. Cement Concr Compos 25:673–680CrossRefGoogle Scholar
  12. 12.
    Faiz UAS, Steve WMS (2015) Compressive strength and durability properties of high volume fly ash (HVFA) concretes containing ultrafine fly ash (UFFA). Constr Build Mater 82:192–205CrossRefGoogle Scholar
  13. 13.
    Nguyen CV, Lambert P, Tran QH (2019) Effect of Vietnamese fly ash on selected physical properties, durability and probability of corrosion of steel in concrete. Materials 12:593CrossRefGoogle Scholar
  14. 14.
    Tittarelli F, Mobili A, Bellezze T (2017) The effect of fly ash on the corrosion behaviour of galvanised steel rebars in Concrete. IOP Conf. Series: Materials Science and Engineering 225: 012107. doi:10.1088/1757-899X/225/1/012107CrossRefGoogle Scholar
  15. 15.
    Choi YS, Kim JG, Lee KM (2006) Corrosion behaviour of steel bar embedded in fly ash concrete. Corros Sci 48:1733–1745CrossRefGoogle Scholar
  16. 16.
    Tae HH, Srinivasan M, Jeong HB, Yoon CH, Hyun GL, Kyung WP, Dae KK (2007) Accelerated short-term techniques to evaluate the corrosion performance of steel in fly ash blended concrete. Build Environ 42:78–85CrossRefGoogle Scholar
  17. 17.
    Montemor MF, Simoes AMP, Salta MM (2000) Effect of fly ash on concrete reinforcement corrosion studied by EIS. Cement Concr Compos 22:175–185CrossRefGoogle Scholar
  18. 18.
    Nguyen CV, Lambert P (2018) Effect of current density on accelerated corrosion of reinforcing steel bars in concrete. Struct Infrastruct Eng.  https://doi.org/10.1080/15732479.2018.1459745 CrossRefGoogle Scholar
  19. 19.
    O'Flaherty FJ, Mangat PS, Lambert P, Browne EH (2008) Effect of under reinforcement on the flexural strength of corroded beams. Mater Struct 41:311–321CrossRefGoogle Scholar
  20. 20.
    British Standard Institution. (2009). BS EN 12390-3:2009. Testing hardened concrete. Part 3: Compressive strength of test specimens. London: BSI Standards LimitedGoogle Scholar
  21. 21.
    Nassar E, Nassar A (2016) Corrosion behaviour of some conventional stainless steels at different temperatures in the electrolyzing process. Energy Proc 93:102–107CrossRefGoogle Scholar
  22. 22.
    Montemor MF, Simoes AMP, Ferreira MGS (2003) Chloride induced corrosion on reinforcing steel: from the fundamentals to the monitoring techniques. Cement Concr Compos 25:491–502CrossRefGoogle Scholar
  23. 23.
    British Standard Institution (2004) Eurocode 2: design of concrete structures—Part 1–1: General rules and rules for buildings (BS EN 1992–1). BSI Standards Limited, LondonGoogle Scholar
  24. 24.
    Nguyen CV, Lambert P, Mangat PS, O'Flaherty FJ, Jones G (2016) Near-surface mounted carbon fibre rod used for combined strengthening and cathodic protection for reinforced concrete structures. Struct Infrastruct Eng 12(3):356–365CrossRefGoogle Scholar
  25. 25.
    Lambert P, Nguyen CV, Mangat PS, O'Flaherty FJ, Jones G (2015) Dual function carbon fibre fabric strengthening and ICCP anode for reinforced concrete structures. Mater Struct J 48(7):2157–2167CrossRefGoogle Scholar

Copyright information

© Iran University of Science and Technology 2020

Authors and Affiliations

  1. 1.The University of Danang-University of Science and TechnologyDanangVietnam
  2. 2.Materials and Corrosion TechnologyAltrinchamUK
  3. 3.Sheffield Hallam UniversitySheffieldUK

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