Microstructural Investigation of Reinforced Concrete Exposed to Cyclic Wetting and Drying

Wahyuniarsih Sutrisno, Priyo Suprobo, Endah Wahyuni, Data Iranata

Abstract


Concrete which placed in an aggressive environment has a great chance to suffer from damage especially for concrete put in the marine environment. In this situation, damage process in concrete is mainly caused by chloride ingress. The chloride penetrates into the concrete by various mechanisms. For concrete submerged in seawater, the chloride solution penetrates into the concrete trough diffusion mechanism and cause damage over the time. However, in real life, reinforced concrete structure mostly placed in the partially saturated area and subjected to the repeated actions of the wetting and drying cycle. This condition makes the concrete structures more vulnerable to corrosion than structures in a fully saturated condition. Therefore, this study investigates the changes in concrete microstructures condition due to repeated actions of wetting and drying. The samples were exposed by 5% NaCl solution through the different configuration of wet and dry duration. The microstructural condition was observed by several methods such as XRF, SEM and EDX analysis. Major constituent phases of concrete and the differences in their distribution due to different duration of wet and dry were observed in this study. Finally, from the investigation, it was found that there were noticeable differences in chloride and magnesium percentage in the samples. This result acts as evidence that the duration of wet and dry can affect the formation of particular compounds such as chloroaluminate, quartz, brucite, and dolomite in the samples which plays roles in the damage process of concrete.

Keywords


reinforced concrete; microstructural; cyclic wetting; drying.

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References


P. O. Iqbal, “Chloride Transport Coupled with Moisture Migration in Non Saturated Concrete Exposed to Marine Environmet and Application to Cracked Concrete,†University of Tokyo, 2008.

Y. Wang, Q. Li, D. Ph, and C. Lin, “Chloride Diffusion Analysis of Concrete Members Considering Depth-Dependent Diffusion Coefficients and Effect of Reinforcement Presence,†vol. 04015183, no. 9, pp. 1–9, 2016.

Q. Yuan, C. Shi, G. De Schutter, and K. Audenaert, “Effect of temperature on the transport of chloride ions in concrete,†Concr. Repair Rehabil. Retrifitting, vol. II, no. 1, pp. 345–352, 2009.

Q. Yuan, C. Shi, G. De Schutter, D. Deng, and F. He, “Numerical Model for Chloride Penetration into Saturated Concrete,†no. March, pp. 305–311, 2011.

R. Rizwan and T. Ishida, “Enhanced electro-chemical corrosion model for reinforced concrete under severe coupled action of chloride and temperature,†Constr. Build. Mater., vol. 25, no. 3, pp. 1305–1315, 2011.

W. L. Jin, Y. D. Yan, and H. L. Wang, “Chloride diffusion in the cracked concrete,†in Fracture Mechanics of Concrete and Concrete Structures-Assessment, Durability, Monitoring and Retrofitting, 2010, pp. 880–886.

B. Stitmannaithum, H. Q. Vu, and M. Van Tran, “Chloride Penetration into Reinforced Concrete Structure,†in Third International Conference on Sustaiable Construction Materials and Technologies, 2013.

Y. Yuan, Y. Ji, and S. P. Shah, “Comparison of Two Accelerated Corrosion Techniques for Concrete Structures,†no. 104, pp. 3–6, 2008.

K. Vu, M. G. Stewart, and J. Mullard, “Corrosion-Induced Cracking : Experimental Data and Predictive Models,†no. 102, pp. 719–726, 2006.

W. Sutrisno, I. ketut Hartana, P. Suprobo, E. Wahyuni, and D. Iranata, “The Experimental Test of Corrosion Induced Cracking in Reinforced Concrete Using Accelerated Method,†Proc. 2nd Makassar Int. Conf. Civ. Eng., 2015.

W W. Sutrisno, P. Suprobo, E. Wahyuni, and D. Iranata, “Cracking Process of Reinforced Concrete Induced by Non-Uniform Reinforcement Corrosion,†Jurnal Teknologi (Sciences & Engineering) 79:3, 1–6, 2017.

W. Sutrisno, P. Suprobo, E. Wahyuni, and D. Iranata “Analysis of Corrosion Induced Crack in Reinforced Concrete with Smeared Crack Approach,†International Journal of Applied Engineering Research vol 11, No 1, pp. 9970-9974, 2016.

K. Hong, “Cyclic Wetting and Drying and its Effects on Chloride Ingress in Concrete,†University of Toronto, 1998.

T. Karthikeyan, A. Dasgupta, P. Magudapathy, S. Saroja, M. Vijayalakshmi, K. G. M. Nair, K. P. N. Murthy, and B. Raj, “Microstructure , Microchemistry , and Prediction of Long-Term Diffusion Behavior of Chloride in Concrete,†vol. 15, no. October, pp. 581–590, 2006.

M. Sosa, T. P. López, J. Reyes, F. Corvo, P. Quintana, and D. Aguilar, “Influence of the Marine Environment on Reinforced Concrete Degradation Depending on Exposure Conditions,†Int. J. Electrochem. Sci., vol. 6, pp. 6300–6318, 2011.

W. Sutrisno, P. Suprobo, E. Wahyuni, and D. Iranata, “Experimental Test of Chloride Penetration in Reinforced Concrete Subjected to Wetting and Drying Cycle,†Appl. Mech. Mater., vol. 851, pp. 846–851, 2016.




DOI: http://dx.doi.org/10.18517/ijaseit.8.2.4313

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