不同加固方法对海砂混凝土锈蚀反应的影响研究

The Effect of Different Reinforcement Methods on the Corrosion Reaction of Sea Sand Concrete

由于海砂混凝土的氯离子含量高于河砂,应用于工程中更容易发生锈蚀反应,出现海砂楼的情况。本文基于耐久性能的考虑,结合现场试验条件研究碳纤维增强基复合材料(CFRP)、玻璃纤维增强复合材料(GFRP)加固与外涂环氧树脂加固方法对钢筋锈蚀现象的抑制作用。结果表明:CFRP、GFRP加固与外涂环氧树脂加固方法均能有效降低钢筋的锈蚀速率,同时发现带肋钢筋与光圆钢筋在加固前后的腐蚀电位差值有明显差异,带肋钢筋的差值更大;基于实用性与耐久性能考虑,对海砂混凝土结构耐久性加固提出了建议。

Due to the higher chloride ion content of sea sand concrete compared to river sand,it is more prone to corrosion reactions after application in concrete construction,resulting in the occurrence of sea sand buildings.This article is based on the consideration of durability and combined with on-site test conditions to study the inhibitory effect of Carbon Fiber-reinforced Polymer(CFRP),Glass-fiber-reinforced Plastics(GFRP)reinforcement,and external epoxy resin reinforcement methods on steel corrosion.Through experimental data,it finds that CFRP,GFRP reinforcement,and external epoxy resin reinforcement methods can effectively reduces the corrosion rate of steel bars.At the same time,it finds that there is a significant difference in the corrosion potential between ribbed steel bars and plain round steel bars before and after reinforcement,and the difference in corrosion potential between ribbed steel bars is even greater.Finally,based on considerations of practicality and durability,givesthe suggestions for the durability reinforcement of sea sand concrete structures.