Free Web Tool

Proctor Compaction

Plot dry density vs moisture content for Standard or Modified Proctor data — quadratic fit gives MDD and OMC.

Inputs

Enter trial moisture content (%) and bulk density (g/cm³ or kg/m³). Tool finds MDD & OMC by quadratic fit.
#w (%)γ (kg/m³)
Method
  • γ_dry = γ_wet / (1 + w/100).
  • Quadratic fit γ_dry = a·w² + b·w + c. OMC = −b/(2a). MDD = γ_dry(OMC).

Results

MDD (γd_max)
OMC