混凝土附加防腐蚀涂层可以阻止混凝土的腐蚀,提高其耐久性。不同类型附加防腐蚀涂层对混凝土结构抗氯离子侵蚀性能的提高作用不同。选择3种表面成膜型涂料、3种渗透型涂层和一种复合型涂层,采用电阻率法研究了涂料种类、水胶比对涂覆涂层的混凝土抗氯离子侵蚀性能的影响。结果表明:涂层能够有效抑制氯离子向混凝土内部扩散,明显提高混凝土的抗氯离子侵蚀性能;在相同水胶比的情况下,成膜型涂料的抗氯离子侵蚀效果一般要优于渗透型涂料,复合型涂料的性能最优;水胶比对涂层阻隔有效性的测试结果略有影响。

The protective layer prevents concrete corrosion and improves its durability.Different types of additional anti-corrosion coatings have different effects on improving the chloride ion corrosion resistance of concrete.Three surface film-forming coatings,three penetrating coatings,and one composite coating were selected,and the influence of coating types and water cement ratio on the chloride ion corrosion resistance of coated concrete was studied using the resistivity method.The results indicate that the coating can effectively inhibit the diffusion of chloride ions into the interior of concrete,and has a significant effect on improving the resistance of concrete to chloride ions.Under the same water cement ratio,the anti chloride ion corrosion effect of film-forming coatings is generally better than that of penetrating coatings,and composite coatings have the best performance.The water to adhesive ratio has a slight impact on the test results of the barrier effectiveness of the coating.