[ G_sb(OD) = \fracM₄V_p - C ]
Let ( B = M₂ - M₁ ) (SSD mass) Let ( C = M₃ - M₂ ) (mass of water added after aggregate) Let ( V_p ) = calibrated volume of pycnometer = mass of water to fill pycnometer (from calibration) [ G_sb(OD) = \fracM₄V_p - C ] Let
[ G_sb(SSD) = \frac\textSSD mass\textSSD mass - (\textmass pycnometer + water to mark - mass pycnometer + SSD agg + water) ] Actually, simplified: [ G_sb(OD) = \fracM₄V_p - C ] Let
Then: [ G_sb(SSD) = \fracBV_p - C ]