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本文主要阐述钠基膨润土粉的防水机理、模型试验和工程应用实例。并提出采用钠基膨润土粉作防水层的施工方法．
This paper describes the sodium bentonite waterproof mechanism, model tests and engineering applications. And proposed the use of sodium bentonite powder as a waterproofing layer construction method.