A vibratory roller traverses a loose fill lift. Grain spacing and lift thickness respond to the calculated dry density; moisture controls the achievable density, and live readouts compare the result with a selected percentage of laboratory maximum.
• 3D scene parts: Vibratory roller; compacted lift cutaway; soil grain and air-void markers; moisture and density station; compaction acceptance gauge. • Controls: Water content (5–25 %); Assumed optimum water content (8–18 %); Laboratory maximum dry density (1700–1950 kg/m³); Selected relative compaction target (90–98 %); Roller pass rate multiplier (0.5–2 ×). • Live readouts: Equivalent passes; Dry density (kg/m³); Wet density (kg/m³); Relative compaction (%); Moisture-limited potential (kg/m³); Zero-air-void dry density (kg/m³); Void ratio. • Guided experiments: Near optimum; Wet fill; Dry of optimum. • Four tabs (visual laboratory, curves and measurements, experiments, learn and assess), a model-verification run, a timestamped event log and a trial report.
ρwet=ρdry(1+w); relative compaction=100ρdry/ρmax ρZAV=Gsρw/(1+wGs), Gs=2.65 Potential=min[0.98ρZAV,ρmax exp(−((w−wopt)/13%)²)], bounded below by initial 1300 ρdry=1300+(potential−1300)[1−exp(−passes/2.5)]
Empirical illustrative moisture/pass model, not a Proctor prediction or equipment specification. Constant dry soil mass, Gs=2.65, loose dry density 1300 kg/m³. Potential is limited below the zero-air-void line. No field moisture transport, lift heterogeneity or discrete-grain forces. Passes are equivalent cumulative exposure, and visual vibration is enlarged. Try the preset experiments, then compare the live readouts with the equations.
No. Wet density includes water mass: ρwet=ρdry(1+w).
No. The achievable potential is explicitly capped below that line.
Empirical illustrative moisture/pass model, not a Proctor prediction or equipment specification. Constant dry soil mass, Gs=2.65, loose dry density 1300 kg/m³. Potential is limited below the zero-air-void line. No field moisture transport, lift heterogeneity or discrete-grain forces. Passes are equivalent cumulative exposure, and visual vibration is enlarged.