Marshall Mix Design Calculator

Calculate Theoretical Specific Gravity, Air Voids, VMA, VFB and Bitumen Volume

Input Parameters

Weight of Coarse Aggregate W1 (%) Weight of Fine Aggregate W2 (%) Weight of Filler W3 (%) Bitumen Content W4 (%)

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Specific Gravity G1 Specific Gravity G2 Specific Gravity G3 Specific Gravity of Bitumen G4 Bulk Specific Gravity Gm

Calculated Results

Theoretical Specific Gravity (Gt)

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Air Voids Vv (%)

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Bitumen Volume Vb (%)

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Voids in Mineral Aggregate (VMA)

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Voids Filled with Bitumen (VFB)

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Formula Used

• Gt = 100 / [(W1/G1) + (W2/G2) + (W3/G3) + (W4/G4)]
• Vv (%) = [(Gt − Gm) / Gt] × 100
• Vb (%) = Gm × [Wb(%) / G4]
• VMA = Vv + Vb
• VFB = (Vb / VMA) × 100

Author

Mohan Dangi (Gold Medalist)
Civil Engineer | Geotechnical Engineer

Disclaimer

This calculator is intended for educational and preliminary design purposes only. Actual Marshall Mix Design should be performed according to IRC specifications, laboratory testing procedures, and project requirements.