Road asphalt spread-rate audit calculator

Calculate observed compacted thickness and mass spread rate with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use observed compacted thickness and mass spread rate to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Delivered asphalt mass (tonnes)
24
Paved area (m²)
200
Compacted density (tonnes/m³)
2.4
Observed compacted thickness (mm)
50
Mass spread rate (kg/m²)
120

Try another scenario

Delivered asphalt mass (tonnes)
25
Paved area (m²)
200
Compacted density (tonnes/m³)
2.4
Observed compacted thickness (mm)
52.083333
Mass spread rate (kg/m²)
125
Calculation method

Calculation method

Observed compacted thickness (mm)

Thickness=delivered mass/(area×density), assuming all delivered material placed in observed area.

Mass spread rate (kg/m²)

Thickness=delivered mass/(area×density), assuming all delivered material placed in observed area.

Symbols and units
a
Delivered asphalt mass (tonnes)
b
Paved area (m²)
c
Compacted density (tonnes/m³)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • User-supplied measurements and assumptions; Thickness=delivered mass/(area×density), assuming all delivered material placed in observed area. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
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