| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Corrosion Behavior of Steel Bars in Modified Coral Aggregate Concrete |
| ZHANG Lu1,2, NIU Ditao1,2, WEN Bo1,2, ZHANG Yongli1,2, CHEN Hao1
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1 School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
2 State Key Laboratory of Green Building in Western China, Xi'an University of Architecture and Technology, Xi'an 710055, China |
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Abstract The durability of reinforced concrete components made from coral aggregate and different admixtures in marine environment were compared. The corrosion behavior of reinforcement in modified coral aggregate concrete (MCAC) was analyzed by electrochemical measurement. The research conclusions are as follows: (Ⅰ) the dynamic potential polarization, capacitance-reactance and impedance modulus curves of steel bars in MCAC were tested by linear polarization and electrochemical impedance spectrum, and the influence of electrochemical parameters on steel bars corrosion was quantitatively analyzed. (Ⅱ) The durability coefficient of MCAC was proposed to represent the improved corrosion resistance value of steel bars in MCAC with FA, SF and GGBS. Compared to the MCAC without admixtures, the chloride resistance of the MCAC containing 10% SF, 20% GGBS, and 20% FA increased by 87.0%, 68.73%, and 50.15%, respectively. (Ⅲ) The regression analysis function of admixtures and corrosion rate of steel bars in MCAC was established, and the correction coefficient of admixtures to the corrosion rate of steel bars in MCAC was obtained.
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Published: 25 March 2022
Online: 2022-03-21
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| Fund:Major Projects of the National Natural Science Foundation of China (51590914), the National Natural Science Foundation of China (52078413,52078415), and Scientific Research Program of Education Department of Shaanxi Province(18JS062). |
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2022, Vol. 36 
