有机防护型阻锈剂对混凝土耐久性的影响

发布时间：2018-03-21 06:57

本文选题：阻锈剂　切入点：力学性能　出处：《硅酸盐通报》2017年01期 　论文类型：期刊论文

【摘要】：钢筋混凝土结构耐久性不足的问题日益严重,而导致该结果的主要原因是氯离子引起的钢筋锈蚀。在提高混凝土结构耐久性的措施中,钢筋阻锈剂因其施工简易、经济、高效等优点而得到了广泛的使用。钢筋阻锈剂的使用目的是保护钢筋防止锈蚀。目前研究和应用较多的多为醇胺类阻锈剂,该类阻锈剂分子结构有其一定的优势,同时也存在一些不足,其中大多具有单个N原子的吸附中心,形成阻挡层的链较短,因此其在钢筋表面形成的吸附膜不够完整和稳定。本文介绍了一种含氨基酮分子的新型有机防护型阻锈剂。该阻锈剂可以在钢筋表面形成完整而稳定的保护膜保护钢筋免受侵蚀,但是其得以应用的前提是与混凝土有较好的相容性,对混凝土耐久性无负面影响。为了研究该阻锈剂对混凝土耐久性的影响,在混凝土试块内掺入不同量的阻锈剂,对其分别进行力学试验、毛细吸水试验,氯离子渗透试验和快速碳化试验,从而评价该阻锈剂对混凝土力学性能、抗渗性能、抗侵蚀性能以及抗碳化性能的影响。研究表明,阻锈剂的应用略微提高了混凝土的抗压强度,改善了混凝土的抗渗性、抗氯离子侵蚀性和抗碳化性,从而混凝土的耐久性得到了一定程度的提高。
[Abstract]:The problem of insufficient durability of reinforced concrete structures is becoming more and more serious, and the main reason for this result is the corrosion of steel bars caused by chloride ions. It is widely used because of its advantages such as high efficiency and so on. The purpose of corrosion inhibitor is to protect steel bar from corrosion. At present, most of the corrosion inhibitors are alkanolamine, and the molecular structure of this kind of corrosion inhibitor has some advantages. At the same time, there are also some shortcomings, most of which have a single N atom adsorption center, forming a short chain barrier layer, Therefore, the adsorption film formed on the surface of steel bar is not complete and stable. In this paper, a new organic protective rust inhibitor containing amino ketones is introduced. This inhibitor can form a complete and stable protective film on the surface of steel bar. The steel bars are protected from erosion, However, the premise of its application is that it has good compatibility with concrete and has no negative effect on the durability of concrete. In order to study the effect of the rust inhibitor on the durability of concrete, different amount of rust inhibitor is added into the concrete specimen. Mechanical tests, capillary water absorption tests, chloride ion penetration tests and rapid carbonation tests were carried out to evaluate the effects of the rust inhibitor on the mechanical properties, impermeability, corrosion resistance and carbonation resistance of concrete. The application of rust inhibitor improves the compressive strength of concrete, the impermeability of concrete, the corrosion resistance and carbonation resistance of concrete, and the durability of concrete is improved to a certain extent.
【作者单位】：青岛理工大学;
【基金】：国家自然科学基金(51608286,51508291) 山东省自然科学基金(ZR2016EEP01) 青岛市建设事业科技发展专项(JK2014-5)
【分类号】：TU528

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