SavedAdd your journal

Journals / Turkish Journal of Civil Engineering / 2020 / Cilt: 31 - Sayı: 6

Corrosion Behavior of Rebars Embedded in Alkali-Activated and Conventional Reactive Powder Concretes

Hüseyin YİĞİTER
Ahsanollah BEGLARIGALE
Serdar AYDIN
Bülent BARADAN
Pages
10359–10378
Publication Date
2020-11-01
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In the propagation stage of chloride induced corrosion, almost 13 times higher corrosion current intensity values were measured as well as earlier deterioration and cracking was observed for ARPC compared to CRPC.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The present study investigated the corrosion behavior of reinforcement bars embedded in alkali-activated (ARPC) and conventional (CRPC) reactive powder concretes.
📊
Key Findings & Data:Corrosion progress in 3.5% NaCl solution, water and air environments were monitored up to 365 days.
💡
Conclusion & Impact:In the propagation stage of chloride induced corrosion, almost 13 times higher corrosion current intensity values were measured as well as earlier deterioration and cracking was observed for ARPC compared to CRPC.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Reactive powder concrete · alkali-activated slag · steel rebar

Abstract

The present study investigated the corrosion behavior of reinforcement bars embedded in alkali-activated (ARPC) and conventional (CRPC) reactive powder concretes. Corrosion progress in 3.5% NaCl solution, water and air environments were monitored up to 365 days. The physical and mechanical characteristics, such as water absorption, rapid chloride ion permeability, compressive and flexural strength, and corrosion characteristics, such as half cell potential and corrosion current intensity results were compared for ARPC and CRPC matrices. Even for the same mechanical performance, alkali-activated mortars were found to have a high permeable structure and an early depassivation of the rebars occurred. In the propagation stage of chloride induced corrosion, almost 13 times higher corrosion current intensity values were measured as well as earlier deterioration and cracking was observed for ARPC compared to CRPC.

Özet

The present study investigated the corrosion behavior of reinforcement bars embedded in alkali-activated (ARPC) and conventional (CRPC) reactive powder concretes. Corrosion progress in 3.5% NaCl solution, water and air environments were monitored up to 365 days. The physical and mechanical characteristics, such as water absorption, rapid chloride ion permeability, compressive and flexural strength, and corrosion characteristics, such as half cell potential and corrosion current intensity results were compared for ARPC and CRPC matrices. Even for the same mechanical performance, alkali-activated mortars were found to have a high permeable structure and an early depassivation of the rebars occurred. In the propagation stage of chloride induced corrosion, almost 13 times higher corrosion current intensity values were measured as well as earlier deterioration and cracking was observed for ARPC compared to CRPC.

🔖

Cite This Article

YİĞİTER, H., BEGLARIGALE, A., AYDIN, S., BARADAN, B. (2020). Corrosion Behavior of Rebars Embedded in Alkali-Activated and Conventional Reactive Powder Concretes. Turkish Journal of Civil Engineering, Cilt: 31 - Sayı: 6, 10359–10378. https://ajindex.com/articles/864199

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (14)

  1. Aydın, S., Development of a Fiber Reinforced Composite with Alkali Activated Ground Granulated Blast Furnace Slag, in The Graduate School of Natural and Applied Sciences. 2010, Dokuz Eylul University: Turkey
  2. Bonneau, O., et al., Characterization of the granular packing and percolation threshold of reactive powder concrete. Cement and Concrete Research. 30(12), 1861-1867, 2000
  3. Ju, Y., et al., Toughness and characterization of reactive powder concrete with ultra-high strength. Science in China Series E-Technological Sciences. 52(4), 1000-1018, 2009
  4. Richard, P. and M.H. Cheyrezy, Reactive powder concretes with high ductility and 200-800 MPa compressive strength. Special Publication. 144507-518, 1994
  5. Aydin, S. and B. Baradan, Effect of activator type and content on properties of alkali-activated slag mortars. Composites Part B-Engineering. 57166-172, 2014
  6. Aydin, S. and B. Baradan, Mechanical and microstructural properties of heat cured alkali-activated slag mortars. Materials & Design. 35374-383, 2012
  7. Aydin, S. and B. Baradan, The effect of fiber properties on high performance alkali-activated slag/silica fume mortars. Composites Part B-Engineering. 45(1), 63-69, 2013
  8. Aydin, S. and B. Baradan, Engineering Properties of Reactive Powder Concrete without Portland Cement. Aci Materials Journal. 110(6), 619-627, 2013
  9. Aydin, S. and B. Baradan, High Temperature Resistance of Alkali-Activated Slag- and Portland Cement-Based Reactive Powder Concrete. ACI Materials Journal. 109(4), 463-470, 2012
  10. Wang, W.R., et al., Corrosion behavior of steel bars immersed in simulated pore solutions of alkali-activated slag mortar. Construction and Building Materials. 143289-297, 2017
  11. Ma, Q.M., et al., Chloride transport and the resulting corrosion of steel bars in alkali activated slag concretes. Materials and Structures. 49(9), 3663-3677, 2016
  12. Holloway, M. and J.M. Sykes, Studies of the corrosion of mild steel in alkali-activated slag cement mortars with sodium chloride admixtures by a galvanostatic pulse method. Corrosion Science. 47(12), 3097-3110, 2005
  13. Babaee, M. and A. Castel, Chloride-induced corrosion of reinforcement in low-calcium fly ash-based geopolymer concrete. Cement and Concrete Research. 88, 96-107, 2016
  14. Chaparro, W.A., J.H.B. Ruiz, and R.D.T. Gomez, Corrosion of Reinforcing Bars Embedded in Alkali-activated Slag Concrete Subjected to Chloride Attack. Materials Research-Ibero-American Journal of Materials. 15(