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Asphalt Density Calculator

This calculator determines the density of asphalt using core sample weights measured in water and air. It’s used in road construction quality control to assess compaction levels and ensure material performance.

Calculate Asphalt Core Sample Density

Input Fields
W₁
g
Weight of empty and dry pycnometer
W₂
g
Weight of pycnometer with bitumen
W₃
g
Weight of pycnometer filled with water at 25°C
W₄
g
Weight of pycnometer with both bitumen and water
If enabled, the result will update automatically when you change any value.

Asphalt Density Formula

Formula
$$\text{Density} = \frac{W_2 – W_1}{(W_3 – W_1) – (W_4 – W_2)}$$

Where:

  • $$W_1$$ = weight of basket in air
  • $$W_2$$ = weight of sample + basket in air
  • $$W_3$$ = weight of basket in water
  • $$W_4$$ = weight of sample + basket in water

This method calculates asphalt density by Archimedes’ principle, using displaced water volume.


Asphalt density is a critical parameter in pavement design and construction. It reflects how well the material has been compacted and its ability to bear loads. This formula is based on the difference between dry and submerged weights of a core sample, allowing accurate field or lab analysis using water displacement techniques.

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