有机防护型阻锈剂对混凝土耐久性的影响

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。

Effect of an Organic Protective Corrosion Inhibitor on Durability of Concrete

The problem of insufficient durability of reinforced concrete has become more and more serious and the main reason is the corrosion of steel caused by chloride ion. Among the measures of improving the durability of concrete structure, the application of inhibitor has been expanded because of its advantages of simple construction, low cost and high efficiency. This paper presented a new type of organic protective inhibitor containing amino ketone molecule. In order to study the effect of this inhibitor on the durability of concrete,the concrete specimens added different quantity of inhibitor are used to carry out the compressive strength test, water absorption test, chloride penetration test and accelerated carbonation test. Then the mechanical property, water resistance, chlorine resistance and carbonation resistance of concrete are evaluated respectively. The results showed that the durability of concrete was improved in a certain extent due to the addition of inhibitor.