Abstract
A Crank-Nicolson based finite difference approach is developed for numerical assessment of chloride diffusion in concrete structures with repairs. The repair by cover concrete replacement is applied at a critical time which the chloride content at a threshold depth reaches its critical value for initiation of rebar corrosion. This aims at corrosion-free condition of concrete structures. The critical time is defined as the repair time, which the CO2 due to repair concrete production and replacement processing occurs. From the study, it is found that increasing the amount of metakaolin in repair concrete by 4 % not only leads to longer service life extension after repairs and fewer repairs but also reduces the amount of CO2 by 50 %.
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References
Petcherdchoo, A.: Time dependent models of apparent diffusion coefficient and surface chloride for chloride transport in fly ash concrete. Constr. Build. Mater. 38, 497–507 (2013)
Bai, J., Wild, S., Sabir, B.: Chloride ingress and strength loss in concrete with different PC-PFA-MK binder compositions exposed to synthetic seawater. Cem. Conc. Res. 33(3), 353–362 (2013)
Shekarchi, M., Rafiee, A., Layssi, H.: Long-term chloride diffusion in silica fume concrete in harsh marine climates. Cem. Concr. Compos. 31(10), 769–775 (2009)
Nai-qian, F., Hsia-ming, Y., Li-Hong, Z.: The strength effect of mineral admixture on cement concrete. Cem. Concr. Res. 18(3), 464–472 (1988)
Petcherdchoo, A.: Maintaining condition and safety of deteriorating bridges by probabilistic models and optimization. Ph.D. thesis, University of Colorado, Boulder, USA (2004)
WCED (The World Commission on Environment and Development): Our Common Future. Oxford University Press, Oxford (1987)
Sakai, K.: Environmental design for concrete structures. J. Adv. Concr. Technol. 3(1), 17–28 (2005)
Heath, A., Paine, K., McManus, M.: Minimising the global warming potential of clay based geopolymers. J. Cleaner Prod. 78, 75–83 (2014)
Petcherdchoo, A.: Service life cycle assessment of chloride attacked concrete structures with silane treatment considering environmental impacts. In: 10th International Symposium. on New Technologies for Urban Safety on Mega Cities in Asia, Thailand (2011)
Crank, J.: The Mathematics of Diffusion, 2nd edn. Clarendon, Oxford (1975)
Thomas, M.D.A., Bentz, E.C.: Life-365 Manual. Master Builders (2000)
Petcherdchoo, A.: Service Life and Environmental Impacts due to Repairs on Concrete Structures under Chloride Attack. Report KMUTNB, Bangkok (2015) (in Thai)
JSCE: Standard Specification for Durability of Concrete. Concrete Library (2002) (in Japanese)
FIB (CEB-FIP): Design of durable concrete structures. In: Structural Concrete Textbook on Behaviour, Design and Performance, 2nd edn., vol. 3. Sprint-Digital-Druck, Stuttgart (2009)
von Rosenberg, D.U.: Methods for the Numerical Solution of Partial Differential Equations. Elsevier, Amsterdam (1969)
Press, W.H., Teukolsky, S.A., Vetterling, W.T., Flannery, B.P.: Numerical Recipes in C: the Art of Scientific Computing, 2nd edn. Cambridge University Press, Cambridge (1996)
FIB (CEB-FIP): Model Code for Service Life Design. Task Group 5.6. Sprint-Digital-Druck, Stuttgart (2006)
Acknowledgment
This research was funded by the board of higher education and King Mongkut’s University of Technology North Bangkok under the contract no. KMUTNB-GEN-58-22.
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Petcherdchoo, A. (2015). Service Life and Environmental Impact Due to Repairs by Metakaolin Concrete After Chloride Attack. In: Scrivener, K., Favier, A. (eds) Calcined Clays for Sustainable Concrete. RILEM Bookseries, vol 10. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-9939-3_5
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DOI: https://doi.org/10.1007/978-94-017-9939-3_5
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