Study on Corrosion and Destroy Mechanism of Concrete under Acidic Conditions

Z. G. Yu, R. R. Chen, B. Mtei

†School of Architecture Engineering, Chongqing Vocational Institute of Engineering, Chongqing 402260, China, 
‡School of Civil Engineering, Chongqing University, Chongqing 400045, China
§Basic Construction Command, Chongqing Medical University, Chongqing 400016, China
††The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania

Cite this paper
Z. G. Yu, R. R. Chen,  B. Mtei, “Study on Corrosion and Destroy Mechanism of Concrete under Acidic Conditions”, Journal of Mechanical Engineering Research and Developments, vol. 39, no. 1, pp. 142-148, 2016. DOI: 10.7508/jmerd.2016.01.020

ABSTRACT: In this research, the concrete specimens were prepared from C20 to C60, coupled effects of sulfate madefaction and dry-wet cycle were used to accelerate the rate of sulfate attack, and compressive strength of each specimen was tested. The results showed that, compared to the same age of water curing specimens, the strength of the dry-wet cycle specimens increased 4%~10% within 30 days. After 30 days, with the age increased, strength began to decrease. In 120 days, C20 decreased 16.3%, C30 decreased 23.1% and C40 decreased 18.9%, C50 and C60 decreased about 7%. The higher strength grade of concrete is, the better the performance of concrete in sulphate corrosion is.

Keywords : Dry-wet cycle; Sulfate; Coupling; Compressive strength

[1] H. F. LI, H. F. TONG, “Mechanical Properties and Sulphuric Acid Erosion Resistance of Carbon Fiber Reinforced Limestone Concrete”, Construction Technology, vol. 40, no. 4, pp. 55-57, April, 2011.
[2] L. A. SHI, H. Y. MA, K. KE, “Concrete’s Resistance to Acide Rain and Its Mechanism”, Journal of Nanjing University of Science and Technology, vol. 36, no. 4, pp. 717-723, April, 2012.
[3] J. M. DU, Y. N. LIANG, F. J. ZHANG, “Mechanism and Performance Degradation of Underground Structure Attacked by Sulfate”, Beijing: China Railway Publishing House, 2011.
[4] Z. X. Yu, J. M. Gao, L. G. Song, “Damage Process of Concrete Exposed to Sulfate Attack under Drying-wetting Cycles and Loading”, Journal of Southeast University (Natural Science Edition), vol. 42, no. 3, pp. 487-491, April, 2012.
[5] J. YIN, S. H. GONG, X. C. ZHANG, “Analysis of Concrete Corrosion Resistant Performance Based on the Coupled Action of Acid Rain and Carbonization”, Journal of Railway Science and Engineering, vol. 8, no. 4, pp. 28-34, April, 2011.
[6] J. J. LUO, D. Y. YANG, J. J. CHEN, “Study on Damage of Steel Corrosion to Concrete in Compound Salt Solution”, China Concrete and Cement Products, no. 4, pp. 1-6, July, 2013.
[7] F. G. LENG, X. X. MA, W. DING, “Durability Analysis of RC Piles Exposed Naturally in Coastal Saline Soil Environment for 17 Years”, Building Structure, vol. 41, no. 11, pp. 148-151, June, 2011.
[8] J. J. SHI, W. SUN, “Evaluation of Steel Corrosion in Concrete Under Simultaneous Flexural Load and Chloride Attacks”, Journal of the Chinese Ceramic Society, vol. 38, no. 7, pp. 1201-1208, July, 2010.
[9] B. Q. SUN, G. Z. LIU, Y. L. LIU, “Research on Grey Forecasting Model for Concrete Carbonation”, Journal of Building Materials, vol. 15, no. 2, pp. 42-47, February, 2012.
[10] X. L. YUAN, “Long-term Physic-mechanical Performance of Advanced Bridge Concrete under Multi-factor Coupling”, Wuhan: Wuhan University of Technology, 2010.
[11] C. C. LI, Y. YAO, L. WANG, “Effect of Chloride Ions on Thaumasite Formation”, Journal of the Chinese Ceramic Society, vol. 39, no. 1, pp. 25-29, January, 2011.
[12] X. B. CHEN, M. X. TANG, K. L. MA, “Underground Concrete Structure Exposure to Sulfate and Chloride Invading Environment”, Journal of Central South University (Science and Technology), vol. 43, no. 7, pp. 2803-2812, July, 2012.
[13] R. G. LIU, J. LI, Q. D. LIU, “Research on Chloride Transmission in Prestressed Concrete Suffering Sulfate Attack”, Bulletin of the Chinese Ceramic Society, vol. 32, no. 4, pp. 547-553, March, 2013.