Influence of Geometry Parameters on Durability of Concrete Structures Exposed to Chloride Environment

Abstract:

Finite difference method (FDM) is used to numerical stimulation analysis for chloride diffusion in concrete. By numerical computing, comparison of chloride content profile in different concrete members with different sectional shapes is made. Calculation and comparison show the chloride content prolife in rectangular and circular section has obvious difference. If the side length of rectangular section is equal to the diameter of circular section, as well as the material property and environment, the chloride content in rectangular section is higher than that in that in circular section. In the calculation example, the chloride content at the depth of reinforcement of circular section is about 50-60% that of rectangular section. This tendency is more remarkable in less section dimension, as well as less cover thickness. With the increasing of section, the ratio of difference becomes to be less until to a constant value. In durability design and service life prediction of concrete structures, the section shape and dimension influence should be taken to consideration.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 3194-3200
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.3194
• Online since: October 2012
• Authors: Xin Gang Zhou, Hui Xia
• Keywords: Chloride Penetration, Durability of Concrete Structures, FDM, Geometry Parameters

References

[1] Odd E. Gjørv. Durability Design of Concrete Structures in Severe Environment, Taylor & Francis, (2008).

[2] Xingang Zhou, et al. Journal of Industrial Construction, Vol.34, No.4 (2004). "In Chinese".

[3] Design and Construction Guide Standard of Concrete Structures (CCES01-2004)，Revised Edition 2005, Standard of CCES, China Architecture & Building Press, Beijing: 2005. "In Chinese".

[4] C.Andrade & A.Castillo. Materials and Corrosion, Vol.54 (2003), P. 379-386.

[5] P.A.M. Basheer, E.Nolan, Construction and building materials, Vol.15 (2001), P. 105-114.

[6] M.B Anoop, K.B Rao, et al. Engineering Structures, Vol.24 (2002), P. 1229-1242.

[7] Anders Lindvall, Environmental Actions and Response Reinforced Concrete Structures exposed in Road and Marine Environments, Thesis for the degree of licentiate of engineering, Goteborg, Sweden (2001).

[8] The European Union – Brite EuRam III, Models for Environmental Actions on Concrete Structures, Document BE95-1347/R3, March 1999.

[9] fib Task Group 5.6, Model Code for Service Life Design, fib Bulletin 34, February 2006.

[10] Bentz and Thomas, M.D.A, Life 365 Service Prediction ModelTM, User Manual 2001.

[11] X. Zhou & J. Zhang, Magazine of Concrete Research, Vol.55, No.3 (2003), P. 143-149.

[12] Zhuoying Li, Xingang Zhou, Zhiyong Liu. Journal of Industrial Construction, Vol.38, No.2 (2008)，"In Chinese".

[13] Harmathy T. Z. Fire Safety Design and Concrete, Longman Scientific & Technical, London: 1993.