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Journals / Teknik Dergi / 2020 / Cilt: 31 - Sayı: 6

Corrosion and Chloride Diffusivity of Reinforced Concrete Cracked under Sustained Flexure

Nilüfer ÖZYURT
Tayfun Altuğ SÖYLEV
Turan ÖZTURAN
Ahmet Onur PEHLİVAN
Anıl NİŞ
Pages
10315–10337
Publication Date
2020-11-01
DOI
—
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AI Summary & Key Takeaways

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

The positive effects of lower water-to-cement ratio and greater cover depth were found to be surpassed by existence of cracks in concrete.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This research discusses the chloride diffusivity of concrete as well as corrosion performance of rebars in cracked and uncracked states.
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Key Findings & Data:Half-cell potential and corrosion rate measurements were carried out following wetting - drying cycles in chloride environment which were continued for 80 weeks.
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Conclusion & Impact:The positive effects of lower water-to-cement ratio and greater cover depth were found to be surpassed by existence of cracks in concrete.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Corrosion · cracked concrete · corrosion rate

Abstract

This research discusses the chloride diffusivity of concrete as well as corrosion performance of rebars in cracked and uncracked states. Prismatic concrete specimens with two water-to-cement ratios, two concrete cover thicknesses with and without steel fibers were used. Three-point flexural loading was applied to form cracks and cracks were sustained by a bolt system. Half-cell potential and corrosion rate measurements were carried out following wetting - drying cycles in chloride environment which were continued for 80 weeks. The positive effects of lower water-to-cement ratio and greater cover depth were found to be surpassed by existence of cracks in concrete.

Özet

This research discusses the chloride diffusivity of concrete as well as corrosion performance of rebars in cracked and uncracked states. Prismatic concrete specimens with two water-to-cement ratios, two concrete cover thicknesses with and without steel fibers were used. Three-point flexural loading was applied to form cracks and cracks were sustained by a bolt system. Half-cell potential and corrosion rate measurements were carried out following wetting - drying cycles in chloride environment which were continued for 80 weeks. The positive effects of lower water-to-cement ratio and greater cover depth were found to be surpassed by existence of cracks in concrete.

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Cite This Article

ÖZYURT, N., SÖYLEV, T. A., ÖZTURAN, T., PEHLİVAN, A. O., NİŞ, A. (2020). Corrosion and Chloride Diffusivity of Reinforced Concrete Cracked under Sustained Flexure. Teknik Dergi, Cilt: 31 - Sayı: 6, 10315–10337. https://ajindex.com/articles/83736

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References (15)

  1. Rodriguez O.G., Hooton R.D., Influence of cracks on chloride ingress into concrete, ACI Materials Journal, 100(2), 120-126, 2003
  2. Win P.P., Watanabe M., Machida A., Penetration profile of chloride ion in cracked reinforced concrete, Cement and Concrete Research, 34, 1073-1079, 2004
  3. Marsavina L., Audenaert K., Schutter G.D., Faur N. and Marsavina D., Experimental and numerical determination of the chloride penetration in cracked concrete, Construction and Building Materials, 23, 264-274, 2009
  4. Gowripalan N., Sirivivatnanon V. and Lim C., Chloride diffusivity of concrete cracked in flexure, Cement and Concrete Research, 30, 725-730, 2000
  5. Schiessl P., Raupach M., Laboratory studies and calculations on the influence of crack width on chloride induced corrosion of steel in concrete, ACI Materials Journal, 94(1), 56-62, 1997
  6. Song H.W., Lee C.H., Ann. K.Y., Factors influencing chloride transport in concrete structures exposed to marine environments, Cement Concrete Composites, 30, 113-121, 2008
  7. Boulfiza M., Sakai K., Banthia N., Yoshida H., Prediction of chloride ions ingress in uncracked and cracked concrete, ACI Materials Journal, 100(1), 38-48, 2003
  8. Aldea C. M., Shah S. P., Karr A., Permeability of cracked concrete, Materials and Structures, 32, 370-376, 1999
  9. Djerbi A., Bonnet S., Khelidj A., Baroghel-bouny, V., Influence of traversing crack on chloride diffusion into concrete. Cement and Concrete Research, 38, 877-883, 2008
  10. Wang K., Jansen D.C., Shah S.P., Karr A.F., Permeability study of cracked concrete, Cement and Concrete Research, 27, 381-393, 1997
  11. Sahmaran M., Effect of flexure induced transverse crack and self-healing on chloride diffusivity of reinforced mortar, Journal of Materials Science, 42, 9131-9136, 2007
  12. Wang H., Lu C., Jin W., Bai Y., (2001) Effect of external loads on chloride transport in concrete, Journal of Materials in Civil Engineering, 23(7), 1043-1099, 2011
  13. Papa N.F., Yinghua Y., Bo D., Effects of crack width on chloride penetration and performance deterioration of RC columns with sustained eccentric compressive load, KSCE Journal of Civil Engineering, 22(2), 637-646, 2018
  14. Chunhua L, Jinmu Y, Hui L, Ronggui L., Experimental studies on chloride penetration and steel corrosion in cracked concrete beams under drying-wetting cycles, Journal of Materials in Civil Engineering, 29(9), 2017:04017114
  15. Beeby A., Corrosion of reinforcing steel in concrete and its relatio