Site investigation · Laboratory: compaction & field density

Relative compaction & moisture variation calculator

Density ratio and moisture variation from field and laboratory results against a specification window.

Standard: AS 1289.5.4.1 · AS 3798

Open the live calculator → All site investigation calculators

Inputs in the worked example

The live calculator starts with these values; change any of them and every result, check and diagram updates instantly.

InputValueUnit
Field dry density1.79t/m³
Field moisture16.4%
Lab MDD1.84t/m³
Lab OMC15%
Min density ratio95%
Moisture variation lower limit-2%
Moisture variation upper limit1%

Worked example — results

ResultValueUnit
Density ratio97.28%
Moisture variation w − OMC1.40%
Moisture ratio109.3%
-4-2024859095100105Moisture variation (%)Density ratio (%)
Diagram for the worked example

Method, formulas and assumptions

Related site investigation calculators

For preliminary design and education. Check every result against the current standard and your own engineering judgement before use.