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T239－91是美国AASHTO参照采用美国材料试验协会（ASTM）标准D3017《采用核子法（浅 层）现场测定土壤及岩石中含水量的标准方法》而制定的应用于公路路基现场测试的标准方 法。在美国，明确规定采用T239中的试验方法测量所获得的数据和结果适用于质量控制和施 工验收。而在我
T239-91 is a standard method developed by AASHTO for on-site testing of highway subgrade based on ASTM standard D3017, “Standard Method for On-site Determination of Water Content in Soil and Rock by Nuclear Method (Shallow Layer)”. In the United States, it is clearly stipulated that the data and results obtained by the test method in T239 are applicable to quality control and construction acceptance. And at me