中文摘要：

综合考虑了外荷载、环境腐蚀介质、材料性状及龄期等影响因素,并从中选取有代表性的因素如应力大小、CO2作用、水灰比、碳化龄期等,设计试验方案,进行混凝土的碳化试验.试验结果表明,混凝土碳化速度随时间缓慢减小;拉应力可促进混凝土碳化,而压应力则抑制其碳化;在一定范围内,水灰比越大,则碳化速度越快.经过对试验数据的拟合回归,建立了多因素交叉影响下的碳化模型,经工程验证,效果较好.

英文摘要：

Stress imposes a marked influence on concrete material and structures＇ durability,most engineering structures are mostly affected by the combined action of several durability deterioration factors,and the above research work is seldom seen at present.Indoor quick concrete carbonation experiment was designed and conducted in consideration of factors including external load,environmental corrosion medium,material properties and operation time,especially stress state and levels,CO2 corrosion,water-cement ratio and carbonation time.The test result shows that concrete＇s carbonation rate decreases with time slowly;tensile stress can accelerate carbonation rate of concrete whereas compression stress retards carbonation.In a certain range,carbonation rate of concrete increases with water-cement ratio.Carbonation model is set up based on crossed influence of multi-factors by fitting and regressing the test data.After validated by engineering example,the model is reasonable.