Specific Gravity And Absorption Of Fine Aggregate Pdf _verified_ | Astm C128

[ G_sb(SSD) = \frac\textSSD mass\textSSD mass - (\textmass pycnometer + water to mark - mass pycnometer + SSD agg + water) ] Actually, simplified:

[ \textAbs = \fracB - M₄M₄ \times 100 ] 5. Sample Data & Results | Parameter | Value | |-----------|-------| | Pycnometer volume (Vp) | 450.0 mL | | Mass empty pycnometer (M₁) | 200.0 g | | Mass pycnometer + SSD agg (M₂) | 700.0 g → SSD mass (B) = 500.0 g | | Mass pycnometer + SSD agg + water (M₃) | 985.0 g | | Mass of water added after agg (C = M₃ – M₂) | 285.0 g | | Mass oven-dry agg (M₄) | 490.7 g | [ G_sb(SSD) = \frac\textSSD mass\textSSD mass - (\textmass

B = 500 g, Vp = 450 mL, C = 340 mL → Bulk SSD = 500/(110) = 4.54 (impossible – sand ~2.6). This shows C should be ~ Vp – (B/2.6). Then: [ G_sb(SSD) = \fracBV_p - C ] For G~2

Then: [ G_sb(SSD) = \fracBV_p - C ]

For G~2.62, SSD mass 500 g → displaced water = 500/2.62 = 191 mL. If pycnometer volume = 450 mL, then water added C = 450 – 191 = 259 mL. Then Bulk SSD = 500/(450-259) = 500/191 = 2.62 ✅. [ G_sb(OD) = \fracM₄V_p - C ] Let

[ 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)