SieveAnalysis Description ASTM D421 References ASTM International (2007). Standard Practice for Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants (Withdrawn 2016) Formulae get_particle_size_from_sieve_number get_cumulative_mass_retained get_percent_finer get_percent_finer_at_sieve_number get_percent_fraction get_percent_finer_diameters get_uniformity_coefficient get_curvature_coefficient