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。

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The coal bed gas reservoirs in China are characterized by low permeability, low desorption speed, low production, rapid production decline and difficult to realize industrial scale production.

中国煤层气藏的特点是渗透率低，解吸速度低，产量低，产量递减快，工业化生产难。

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Authors adopted the rapid chloride permeability test method to research influences of fly-ash amount on anti-chloride-permeability performances of steam cured concrete.

采用快速氯离子渗透试验方法研究了粉煤灰掺量对蒸汽养护混凝土抗氯离子渗透性能的影响。

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