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有机阻锈剂对管桩混凝土性能影响分析

Analysis of the Impact of Organic Corrosion Inhibitors on the Properties of Pipe Pile Concrete

  • 摘要: 氯盐侵蚀引发的钢筋锈蚀是导致沿海工程结构管桩失效事故的主要原因之一,氯盐对钢筋混凝土结构耐久性构成了巨大威胁。因此,在管桩混凝土中掺加阻锈剂已成为抑制钢筋锈蚀、提升结构服役寿命的重要技术措施。然而,阻锈剂的引入在保护钢筋的同时,也可能对混凝土自身的关键性能如力学性能及抗氯离子渗透性产生复杂影响,而目前关于有机阻锈剂对管桩混凝土综合性能影响的系统性研究尚显不足。为此,本文选取了两种典型的有机阻锈剂,深入对比研究了不同掺量下阻锈剂对管桩混凝土工作性能、力学性能以及抗氯离子渗透性能的影响规律。在此基础上,通过钢筋失重法,初步评价了两种阻锈剂在管桩混凝土基体中的短期阻锈效能。研究成果对于分析有机阻锈剂对管桩混凝土性能的影响规律和作用机制以及实际工程中对阻锈剂的选用具有一定的借鉴意义。

     

    Abstract: Failures of pipe piles caused by corrosion of reinforcing bars due to chloride salt erosion are quite common in coastal engineering structures. The significant threat that chloride salts pose to the durability of reinforced concrete structures has led to the adoption of admixtures that resist corrosion as an important technical measure to inhibit corrosion of reinforcing bars and extend the service life of the structures. However, the introduction of corrosion inhibitors may have complex effects on the key properties of concrete, such as mechanical properties and resistance to chloride ion penetration, while the systematic research on the comprehensive performance of organic corrosion inhibitors on pipe pile concrete is still insufficient at present. Therefore, this paper selected two typical organic corrosion inhibitors and conducted in-depth comparative studies on the influence of different dosages of the inhibitors on the working performance, mechanical properties, and chloride ion resistance of pipe pile concrete. Based on this, the short-term corrosion inhibitory efficacy of the two inhibitors in the concrete matrix of pipe piles was preliminarily evaluated using the weight loss method of reinforcing bars. The research results have certain reference significance for analyzing the influence patterns and mechanisms of organic corrosion inhibitors on the performance of pipe pile concrete and the selection of corrosion inhibitors in actual engineering.

     

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