摘   要：通过试验研究不同水灰比和锂渣替代率的混凝土试件在不同侵蚀龄期、氯盐溶液浓度的作用下，探讨锂渣对混凝土抗氯离子侵蚀性能的影响。试验采用自然浸泡法研究氯离子在饱和混凝土中扩散传输性能，通过钻芯取样，分层研磨，依照水溶性氯离子含量的测定方法获取各试件不同深度的氯离子浓度。结果表明，氯离子在混凝土中的扩散能很好地吻合Fick第二定律；锂渣作为矿物掺合料替代水泥后能有效降低氯离子在混凝土中的扩散，当锂渣掺量为20%和30%时，混凝土氯离子扩散系数仅相当于空白试件的40%和37%。水灰比的降低能够显著降低混凝土氯离子扩散系数；随着侵蚀龄期的增大，氯离子扩散系数减小，且各龄期下掺入锂渣的混凝土氯离子扩散系数均比空白试件小。

Abstract: The experiment compared the age of corrosion, the amount of lithium slag, chlorine salt solution concentration of concrete working environment and the change of water cement ratio, the performance of the resistance to chloride ingress of concrete doped with lithium slag was investigated. The chloride ion diffusion transport in saturated concrete performance is used to study by the natural immersion method. The concrete in different depth of chloride ion concentration was estimated by the drilling concrete cores and the water soluble method. The results show that diffusion of chloride ions in concrete conforms to the Fick's second law, lithium slag as mineral admixtures can effectively reduce the chloride diffusion in concrete, when the doped lithium slag is 20% and 30%, chloride ion diffusion coefficient of concrete is equal to the blank specimen of 40% and 37%, chloride diffusion coefficient decrease with the decrease of water to binder ratio. With the increasing of corrosion age, the chloride diffusion coefficient decreased, and at every corrosion age, the chloride diffusion coefficient of concrete mixed with lithium slag is lower than that of the blank specimen.