中文摘要：

对某高速公路隧道衬砌混凝土进行了快速碳化试验，探讨了应力状态、应力水平及水灰比对混凝土碳化的影响规律，建立了变碳化系数多因素碳化模型，并对碳化影响因素进行了灰关联分析。结果表明：拉、压应力分别加快和减缓了混凝土的碳化速率，且应力水平越高，碳化速率的改变越大；碳化速率随水灰比的增加而加快；碳化系数并不是常数，而是随碳化龄期呈现明显的时变特性；碳化龄期对碳化深度影响最大，应力水平影响次之，而水灰比影响最小。

英文摘要：

The carbonation test of lining concrete specimens of an expressway tunnel was carried out and the influence rule of stress state, stress level and water cement ratio on carbonation speed was discussed. Based on the test, authors developed a carbonation model with variable carbonation coefficient and conducted grey correlation analysis on the factors, such as stress level, water cement ratio and carbonation age. The result shows that tensile stress and compressive stress are able to accelerate or slow down the concrete carbonation respectively, and the larger the stress level is, the larger the change in carbonation speed is. Meanwhile, the carbonation speed will increase with increase of water cement ratio. In addition, carbonation coefficient is not constant but will vary with carbonation age. Carbonation age has the greatest influence on carbonation speed, and influence of stress level on it takes the second place, while water cement ratio has the least influence on it.