《Table 2 A list of criteria for CCBE》

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《植物种类对由建筑垃圾构筑而成的三层土覆盖层系统防渗特性的影响研究（英文）》

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The properties of the cover materials used in this study are presented in Table 1.The particle data were obtained from a sieve analysis described in ASTM D422 standard（ASTM，2007）.Specific gravity tests were performed based on the ASTM D854 standard test method（ASTM，2010a）.Atterberg limit tests were conducted in accordance with ASTM D4318（ASTM，2010b）.The compaction curves for the CDG，FRC，and CDV were determined following ASTM D698（ASTM，2012）.The saturated permeability（ks）of compacted FRC and CDV was measured using a flexible wall permeameter according to ASTM D5084（ASTM，2010c），whereas ks of CRC was tested by the constant-head method as described in ASTM D2434（ASTM，2006）.According to the unified soil classification system（USCS）（ASTM，2011） ，CDG，FRC，CRC，and CDV were classified as silty sand（SM），well-graded sand（SW），poorly graded gravel（GP），and silt（ML），respectively.