建立了单一粉煤灰影响因子模型，分析了粉煤灰掺量对混凝土空气渗透系数的影响。

The model of a factor that fly ash effects on carbonation resistance was found, effect of fly ash on the air infiltration coefficient is analyzed.

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介绍的实验室方法——自然降压法，结合实验数据，给出一个测量非饱和湿沥青样品空气渗透系数的方法。

This paper develops a model for measuring air permeability of partially saturated asphalt samples using falling-pressure method in laboratory introduced by Li et al.

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介绍的实验室方法——自然降压法，结合实验数据，给出一个测量非饱和湿沥青样品空气渗透系数的方法。

This paper develops a model for measuring air permeability of partially saturated asphalt samples using falling-pressure method in laboratory introduced by Li et al.

youdao