ISO 17892-3:2015规定了土壤颗粒密度的测定方法。 ISO 17892-3:2015适用于岩土工程勘察范围内土壤颗粒密度的实验室测定，并描述了两种方法，一种是流体置换比重瓶法，另一种是气体置换比重瓶法。 ISO 17892本部分所述的液体比重瓶法适用于粒径小于约4mm的土壤类型，或为满足该要求而压碎的土壤。 较大的比重瓶用于较粗的材料。适用于气体比重瓶测试的土壤粒度受所用特定气体比重瓶样品容器的尺寸限制。 注1 ISO 17892-3:2015符合EN 1997-1和EN 1997-2规定的岩土工程勘察和试验土壤颗粒密度测定要求。 注2:孔隙水中溶解盐的存在可能会影响这些试验的结果。可以使用补偿溶解盐的技术，但不在本标准的范围内。

ISO 17892-3:2015 specifies methods for the determination of the particle density of soils. ISO 17892-3:2015 is applicable to the laboratory determination of the particle density of soil within the scope of geotechnical investigations, and describes two methods, a pycnometer method by fluid displacement and a pycnometer method by gas displacement. The fluid pycnometer method described in this part of ISO 17892 applies to soil types with particle sizes under about 4 mm, or soils crushed to meet this requirement. Larger pycnometers are used for coarser materials. The particle size of soils suitable for testing in the gas pycnometer is limited by the dimensions of the specimen container of the particular gas pycnometer being used. NOTE 1 ISO 17892-3:2015 fulfils the requirements of the determination of particle density of soils for geotechnical investigation and testing in accordance with EN 1997-1 and EN 1997-2. NOTE 2 The presence of dissolved salts in the pore water can affect the results of these tests. Techniques for compensating for dissolved salts are available but are beyond the scope of this standard.