Research mechanism of diffusion and infiltration of concrete, analyze the main influence factor of the concrete permeability and summarized the method of testing of the penetrating index of concrete.
研究了水、氯离子及气体在混凝土中的渗透与扩散的机理，分析了影响混凝土渗透性的主要因素及有待进一步研究的方向，并总结了混凝土渗透性指标的测试方法。
Permeability of concrete and its correlation with chloride ion diffusion coefficient under different test conditions including water pressure method and tension method are studied.
本课题主要研究混凝土在水压法及张力法试验条件下水在混凝土中的渗透行为以及同氯离子扩散系数相关性。
The permeability (P), diffusion (D) and solubility (S) coefficients for polymers and coatings are key parameters that affect a polymer's barrier performance.
聚合物和涂层材料的渗透系数（P）、扩散系统（D）和溶解系数（S）是影响聚合物阻隔性能的关键参数。
It was indicated that the covering with low diffusion coefficient, small porosity and bad permeability was suitable to cover the pile.
扩散系数小、孔隙度低、渗透性差的材料适于做覆盖材料。
Methods Using V-C diffusion cells, the permeability of HST from patch through the skin of human and SD rat was studied.
方法采用V-C水平扩散池，以透皮速率为指标，研究HST贴剂在离体人皮中的透过性。
The effect of concrete carbonization degrees on chloride diffusion coefficient has been analyzed by rapid carbonization test and rapid permeability test;
进行了室内混凝土快速碳化试验和氯离子快速渗透试验。通过试验，研究了混凝土不同碳化程度对氯离子扩散系数的影响。
The effect of active carbon granularity-on properties of air diffusion electrode is introduced in this article in order to improve the permeability and electrochemical property of layer.
为了改善空气扩散电极的电化学性能，对活性炭粒度分布对空气扩散电极性能的影响进行了研究。
The results showed that the aromatics selective permeability of composite membrane was affected by both solubility selectivity and diffusion selectivity.
结果表明，复合膜的芳烃选择性是溶解选择性和扩散选择性共同作用的结果。
The results showed that the aromatics selective permeability of composite membrane was affected by both solubility selectivity and diffusion selectivity.
结果表明，复合膜的芳烃选择性是溶解选择性和扩散选择性共同作用的结果。
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