Browse > Article

Electrochemical Studies on the Corrosion Performance of Steel Embeded in Activated Fly Ash Blended Concrete  

Song, Ha-Won (연세대학교 사회환경시스템공학부)
Lee, Chang-Hong (연세대학교 사회환경시스템공학부)
Lee, Kewn Chu (연세대학교 사회환경시스템공학부)
Velu, Saraswathy (인도국립중앙전기화학연구소)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.12, no.6, 2008 , pp. 97-108 More about this Journal
Abstract
The use of fly ash to replace a portion of cement has resulted significant savings in the cost of cement production. Fly ash blended cement concretes require a longer curing time and their early strength is low when compared to ordinary Portland cement(OPC) concrete. By adopting various activation techniques such as physical, thermal and chemical method, hydration of fly ash blended cement concrete was accelerated and thereby improved the corrosion-resistance of concrete. Concrete specimens prepared with 10-40% of activated fly ash replacement were evaluated for their open circuit potential measurements, weight loss measurements, impedance measurements, linear polarization measurements, water absorption test, rapid chloride ion penetration test and scanning electron microscopy (SEM) test and the results were compared with those for OPC concrete without fly ash. All the studies confirmed that up to a critical level of 20-30% replacement; activated fly ash cement improved the corrosion-resistance properties of concrete. It was also confirmed that the chemical activation of fly ash better results than the other methods of activation investigated in this study.
Keywords
reinforcement corrosion; fly ash activation; activated fly ash cement; corrosion resistance; electrochemical studies;
Citations & Related Records
연도 인용수 순위
  • Reference
1 C. Shi, Early microstructure development of activated lime-fly ash pastes, Cem. Conc. Res. 26, 1996, p. 1351   DOI   ScienceOn
2 J. Paya, J. Monzo, M.V. Borrachero, E. Peris-Mora, E. Gonzalez-Lopez, Mechanical treatment of fly ashes. Part II: Particle morphologies in orund fly ashes (GFA) and workability of GFA-cement mortars, Cem. Conc. Res. 26, 1996, p. 225   DOI   ScienceOn
3 P.S. Mangat, B.T. Molloy, Influence of PFA, slag and micro silica on chloride-induced corrosion of reinforcement in concrete, Cem. Conc. Res. 21, 1991, p. 819   DOI   ScienceOn
4 ASTM C 642-80, Standard Test Method for Specific Gravity, Absorption and Voids in Hardened Concrete, American Society of Testing and Materials, Philadelphia, 4, 1995, p. 318
5 V. Saraswathy, S. Muralidharan, R.M. Kalyanasundaram, K. Thangavel, S. Srinivasan, Evaluation of a composite corrosion inhibiting admixture and its performance in concrete under macro cell corrosion conditions. Cem. Conc. Res. 31, 2001, p. 789   DOI   ScienceOn
6 S. Muralidharan, V. Saraswathy, K. Thangavel, S. Srinivasan, J. Appl. Electrochem. Competitive role of inhibitve and aggressive ions in the corrosion of steel in concrete, J. Applied Electro-chemistry, 30, 2000, p. 1255   DOI   ScienceOn
7 R. Fang, T. Zhang, Cement Lime 1, 21 (in Chinese), 1992
8 J. Paya, J. Monzo, M.V. Borrachero, E. Peris-Mora, Mechanical treatment of fly ashes - Part I: Physico chemical characterization of ground fly ashes, Cem. Conc. Res. 25, 1995, p. 1469   DOI   ScienceOn
9 M. Thomas, Chloride thresholds in marine concrete, Cem. Concr. Res. 26, 1996, p. 513   DOI   ScienceOn
10 M.M. Salta, in: R.N. Swamy (Ed.), Influence of fly ash on chloride diffusion in concrete, vol. 2, Sheffield Academic Press, Sheffield, 1994, pp. 794-804
11 V. Saraswathy, S. Muralidharan, K. Thangavel, S. Srinivasan, Influence of activated fly ash cements: tolerable limit of replacement for durable steel reinforced concrete. Cem. Conc. Comp. 25, 2003, p. 673   DOI   ScienceOn
12 J.P. Behera, B. Sarangi, B.D. Nayak, H.S. Ray, Investigations on the development of blended cements using activated fly ash. Ind. Concr. J. 74, 2000, p. 260
13 K.O. Ampadu, K. Toril, M. Kawamura, Beneficial effect of fly ash on chloride diffusivity of hardened cement paste, Cem. Conc. Res. 29, 1999, p. 585   DOI   ScienceOn
14 T.R. Naik, S.S. Singh, Influence of fly ash on setting and hardening characteristics of concrete systems, ACI Mater. J. 94, 1997, p. 355
15 T.R. Naik, S.S. Singh, M.W. Hussain, Permeability of concrete containing large amounts of fly ash, Cem. Conc. Res. 24, 1994, p. 913   DOI   ScienceOn
16 R.D. Crow, E.R. Dunstan, Properties of fly ash concrete, in: S. Diamond (Ed.), Proc. on fly ash incorporation in hydrated cement system, Materials Research Society, Boston, MA, 1981, p. 214
17 Y. Matsufuji, H. Kohata, K. Tagaya, H. Teramoto, Y. Okawa, S. Okazawa, in: V.M. Malhotra, Proceedings of the Fourth CANMET/ACI International Conference on the Use of Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concrete, Istanbul, Turkey, ACI, Detroit, MI, SP-132, vol. 1, 3-8 May 1992, p. 351
18 V. Saraswathy, S. Muralidharan, K. Thangavel, S. Srinivasan, Activated fly ash cements: tolerable limit of replacement for durable steel reinforced concrete. Adv. Cem. Res. 14, 2002, p. 9   DOI   ScienceOn
19 J. Bai, B.B. Sabir, S. Wild, J.M. Kinuthia, Magn. Strength development in concrete incorporating PFA and metakaolin. Concr. Res. 52, 2000, p. 153   DOI
20 F. Yueming, Y. Suhong, W. Zhiyun, Z. Jingyu, Activation of fly ash and its effects on cement properties. Cem. Conc. Res. 29, 1999, p. 467   DOI   ScienceOn
21 C. Liu, Z. Wen, Monograph on Dam Engineering Concrete (1): Alkali- Aggregate Reactions in Concrete Published (in Chinese), South China University of Technology, 1995, p. 354
22 J. Paya, J. Monzo, E. Peris-Mora, M.V. Borrachero, R. Tercero, C. Pinillos, Early strength development of Portland cement mortars containing air classified fly ashes. Cem. Conc. Res. 25, 1995, p. 449   DOI   ScienceOn
23 G. Gopalakrishnan, N.P. Rajamanee, M. Neelamegam, J.A. Peter, J.K. Dattatreya, Ind. Concr. J. 75, 2001, p. 335
24 ASTM C876-1995: Standard Test Method for Half Cell Potentials of Reinforced Steel in Concrete, American Society of Testing and Materials, Philadelphia, 4