Research on the Resistance of Main Hydrophobic Concrete to Chloride Ion Corrosion
Marine concrete is easily corroded by chloride salts,leading to accelerated corrosion of steel bars and decreased concrete strength.In this article,concrete with inherent hydrophobic properties was prepared by adding hydrophobic agents.The ability of hydrophobic concrete to resist chloride ion intrusion during the immersion and drying process was tested through multiple chloride salt soaking and drying treatments.The reinforcement performance of hydrophobic concrete in chloride salt corrosion environments was studied through electrochemical accelerated steel corrosion experiments.The research results indicate that the addition of hydrophobic agents has no significant adverse effect on the development of compressive strength of concrete;the addition of hydrophobic agents effectively reduces the amount and depth of chloride ion intrusion during the salt water immersion drying cycle of concrete specimens.When the depth of the water absorption surface of the concrete is 0～2 mm,the hydrophobic concrete accumulates more chloride ions;when the depth of the water absorption surface of the concrete is 8～10 mm,the chloride ion content in the hydrophobic concrete of Z2 and Z3 groups is only 30%of that in the blank group concrete,significantly improving the concrete's resistance to chloride ion erosion;in addition,the addition of hydrophobic agents significantly delays the corrosion process of steel bars embedded in concrete.The corrosion degree of hydrophobic concrete after 11 days of electrification is equivalent to that of ordinary concrete after 4 days of electrification,demonstrating excellent reinforcement performance as hydrophobic concrete.
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维普
