Freeze-Thaw Deterioration Mechanism of Concrete in Different Multi-Aggressive Solution

Abstract:

Deterioration mechanism of concrete suffered slowly freeze-thaw and eroded in different mixed liquor (3%NaCl+5%NaSO₄, 3%NaCl+1.5%NaSO₄, 5%NaSO₄, water) were experimental investigated. The hydration product and microstructure of concrete specimen after 100 circles of freeze-thaw was tested and analyzed with SEM (Scanning Electron Microscope). The result indicated that under the interactions of freeze-thaw and mixed erosive solution, there were not only physical changes but also chemical reactions occurred in concrete, which exacerbate the mechanical properties deterioration of concrete. The mechanical performance and microstructures of concrete deteriorated most significantly in the mixed solution 3%NaCl+5%NaSO₄, and deteriorated more significantly in the mixed solution 3%NaCl+1.5%NaSO₄.

• Periodical: Advanced Materials Research (Volumes 163-167)
• Pages: 1708-1713
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.163-167.1708
• Online since: December 2010
• Authors: Xiao Ning Zheng, Bo Diao, Jian Zhang, Yan Dong Li
• Keywords: Concrete, Durability, Freeze-Thaw Circle, Mechanism of Deterioration, Multi-Aggressive Environment

References

[1] JIN Zuquan, SUN Wei, ZHANG Yunsheng, JIANG Jinyang. Damage of Concrete in Sulfate and Chloride Solution[J]. Journal of the Chinese Ceramic Society, 2006, 34(5), P630-635. (in Chinese).

[2] JIANG Minqiang, CHEN Jiankang, YANG Dingyi. Dynamic Modulus of Cement Mortar in Sulphate Erosion Measured by Ultrasonic Checking[J]. Journal of the Chinese Ceramic Society, 2005, 33(1), P126-132. (in Chinese).

[3] MU Ru, MIAO Changwen, LIU Jiaping, S UN Wei. Effect of NaCI and Na2SO4 Solution on the Frost Resistance of Concrete and Its Mechanism[J]. Journal of the Chinese Ceramic Society, 2001, 29(6), P523-529. (in Chinese).

[4] ZHAN Binggen, SUN Wei, SHA Jianfang. Influence of freeze-thaw cycles on secondary deterioration of concrete caused by alkali silica reaction[J]. Journal of Southeast University (Natural Science Edition). 2005, 35(4), P598-601. (in Chinese).

[5] YU Hongfa, SUN Wei, YAN Lianghui, YANG Bo. Freezing-Thawing Durability of High Strength and High Performance Concrete Exposed to Salt Lakes [J]. Journal of the Chinese Ceramic Society, 2004, 32(7), P842-88. (in Chinese).

[6] YU Hongfa, SUN Wei, LI Meidan. Effect of flexural stress on strength development of concrete subjected to combined actions of freezing － thawing cycles and chemical attack. Journal of Harbin institute of technology, 2010, 42(2): 297-301.

[7] Diao Bo, Sun Yang, Ma Bin. Experiments of persistent loading reinforced concrete beams under the alternative actions of a mixed corrosive solution and freeze-thaw cycles [J]. Journal of Building Structures, 2009, 30(s): 281–286. (in Chinese).

[8] Zheng Xiaoning, Diao Bo, Sun Yang, Zhang Woman. Study of deterioration mechanism of concrete in multi-corrosive and freeze-thaw environment [J]. Journal of Building Structures, 2010, 31(2): 111–116. (in Chinese).

[9] JIN Zuquan. Durability and Service Life Prediction of Concrete Exposed to Harsh Environment in West of China [J]. 2006. PHD Paper of Southeast University. (in Chinese).