中文摘要：

在结冰融化和碳酸饱和的引申下面的水力的具体耐久性系统地在这个工作被调查了，在微部分和具体接口的显微镜的特征基于计算断层摄影术(CT ) 被分析的地方测试和扫描电子显微镜学(SEM ) 。每节的平均 CT 数字，在 0.35 的水水泥比率衰退了，在 0.45 点增加了，并且在 0.55 点有点变化了。当苍蝇灰不在时的标本展出了水和产品的更少的类型，表面被观察是像针的 ettringite，与相对稠密的全面结构。然而随苍蝇灰内容的增加，毛孔并且标本结构微裂缝增加。六角形的薄片氢氧化钙，在在第一碳酸饱和以后的标本在场，在主要水和产品是 ettringite 和钙硅酸盐胶化的第一 freezethaw 的测试片是可以忽略的。氢氧化钙的常规六角形的盘子在 charring 首先在发生了的标本的内部展出了，但是氢氧化钙很少在结冰融化首先在发生了的标本的内部存在。

英文摘要：

The hydraulic concrete durability under the alternation of freeze-thaw and carbonation has been systematically investigated in this work, where both the micro part and the microscopic characteristics of concrete interface were analyzed based on computed tomography（CT） test and scanning electron microscopy（SEM）. Average CT numbers of each section, declined at water-cement ratio of 0.35, increased at 0.45, and changed a little at 0.55. The specimen in the absence of fly ash exhibited less types of hydration products and the surface was observed to be a needle-like ettringite, with a relatively dense overall structure. However, with the increase of fly ash content, pores and micro-cracks of specimen structure increased. Hexagonal flake calcium hydroxide, present in the specimen after the first carbonation, was negligible in the test pieces of the first freezethaw where the main hydration products were ettringite and calcium silicate gel. Regular hexagonal plates of calcium hydroxide exhibited in the interior of the specimen in which charring first occurred but calcium hydroxide rarely existed in the interior of the specimen in which freeze-thaw first occurred.