This paper introduced the mechanism of concrete freeze-thaw damages, and analyzed the effect of concrete air content to concrete strength and bubbles spacing factor, obtained some useful conclusions, provided reference for selection of freeze-thaw resistance concrete admix-ture.%介绍了混凝土冻融破坏的机理，并对混凝土含气量对混凝土强度和气泡间距系数的影响进行了分析，得出了一些有益的结论，为配置抗冻融混凝土外加剂的选择提供了参考。
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