The Reliability Analysis of the Initiation Time for RC Members under Chlorine Salt Ingress and Local Micro-Climate

Abstract:

The initiation time of reinforcement was researched for reinforced concrete (RC) members along coast regions under chlorine salt ingress and local micro-climate. Based existing chlorine erosion model, when local temperature and relative humidity were considered, the initiation time of reinforcement for RC members were calculated by using Monte-Carlo method, and the influence parameters of the initiation time were researched. According to probability theory, the probability distribution and density of the initiation time was given for RC members in tropical, subtropical and temperate zone along coast in china, for example Haikou City, Shanghai City, and Tianjin City. The research results showed: The impact on the initiation time from local temperature and relative humidity should not be ignored. It should be reasonable to consider when RC members were designed. This would be useful for structure strengthening, maintenance, and remaining life prediction.

• Periodical: Materials Science Forum (Volume 866)
• Pages: 134-138
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.866.134
• Online since: August 2016
• Authors: Jun Ting Jiao*, Ying Hua Ye, Chen Fei Wang, Guo Chen Ye
• Keywords: Chlorine Salt Ingress, Initiation Time, Reinforced Concrete Remembers, Relative Humidity, Reliability, Temperature

References

[1] X. G. Qiu, X. X. Ma, X. W. Sun, Study on corrosion rules of reinforced concrete buried in seaside salt soil , Building Science, 17(2001) 41-43. (in chinese).

[2] Y. Zhang, L. X. Jiang, W. P. Zhang, The durability introduction of concrete structures, Shanghai Science and Technology Publishing Press, Shanghai, 2003. (in chinese).

[3] Q. Xu, H. Y. Yu, Research and Practice on durability of large marine concrete structures, China Building Industry Press, Beijing, 2008. (in chinese).

[4] S. B. Allampllewar, A. Srivdya, Corrosion initiation time for reinforced concrete members along Indian coast: Effects of temperature and relative humidity - A probabilistic approach, Construction & Building Materials, 15(2008) 539-533.

DOI: 10.1142/s0218539308003210

[5] A. Alhozaimy, R. R. Hussain, R. Al-Zaid, A. Al-Negheimish, Coupled effect of ambient high relative humidity and varying temperature marine environment on corrosion of reinforced concrete, Construction & Building Materials, 28(2012) 670-679.

DOI: 10.1016/j.conbuildmat.2011.10.008

[6] J. W. Ying, Zh. Ch. Zhao, X. D. Yang, Research of chlorides diffusion coefficient in local climate, Journal of Guangxi University (Nat Sci Ed), 33(2008) 32-37. (in chinese).

[7] J. T. Jiao, Y. H. Ye, R. H. Yang, The initiation time for reinforced concrete members under chlorine salt erosion and climate, Acta Scientiarum Naturalium Universitatis Sunyatseni, 55(2016) 85-90. (in chinese).

[8] M. P. Thomas, E. C. Bentz, Life-365: Computer program for predicting the service life and life cycle costs of reinforced concrete exposed to chlorides, Fairfax, USA: Silica Fume Association, (2001).

[9] P. S. Mangatps, B. T. Molloy, Prediction of long term chloride concentration in concrete, Materials & Structures, 27(1994) 338-346.

DOI: 10.1007/bf02473426

[10] Z. Bažant, L. J. Najjar, Drying of concrete as a nonlinear diffusion problem, Cement & Concrete Research, 1(1971) 461-473.

DOI: 10.1016/0008-8846(71)90054-8

[11] E. H. Jinane, B. Phlippe, C. Alaa, E. T. Khaled, Reliability-based assessment of the effect of climatic conditions on the corrosion of RC structures subject to chloride ingress, Engineering Structures, 32(2010) 3279-3287.

DOI: 10.1016/j.engstruct.2010.07.001

[12] D. V. Val, M. G. Stwwart, Life-cycle cost analysis of reinforced concrete structures in marine environments, Structural Safety, 25(2003) 343–362.

DOI: 10.1016/s0167-4730(03)00014-6

[13] Wikipedia in Chinese, Wikipedia foundation is the person in charge (Update Date: October 16, 2014) [Reference date: February 5, 2015]. Website: https: /zh. Wikipedia. org/wiki.

[14] E. C. Bentz, Probabilistic modeling of service life for structures subjected to chlorides, ACI Materials Journal, 100(2003) 391-397.

DOI: 10.14359/12814