Bitumen Quantity Calculator
The Bitumen Quantity Calculator is a useful engineering tool to estimate the amount of bitumen required for road construction works such as Prime Coat, Tack Coat, Dense Bituminous Macadam (DBM), and Bituminous Concrete (BC).
In highway construction projects, accurate estimation of bitumen is important for proper cost estimation, material planning, and execution of asphalt pavement layers. This calculator helps civil engineers, contractors, and students quickly determine the bitumen requirement per square meter or for an entire road area.
—Bitumen Quantity Calculator Tool
Formula Used for Bitumen Calculation
The quantity of bitumen required for road construction is calculated using the following formula:
Bitumen Quantity = Area × Application Rate
Where:- Area = Length × Width
- Application Rate = Bitumen applied per square meter
- Prime Coat = 0.8 kg/m²
- Tack Coat = 0.3 kg/m²
- DBM Layer = 110 kg/m³
- BC Layer = 120 kg/m³
Example Calculation
Suppose a road section has the following dimensions:
- Length = 100 meters
- Width = 7 meters
- Application Rate = 0.8 kg/m² (Prime Coat)
First calculate the area of the road.
Area = Length × Width
Area = 100 × 7 = 700 m²
Now calculate bitumen quantity.
Bitumen Required = 700 × 0.8
Bitumen Required = 560 kg
—Standard Bitumen Application Rates (MoRTH Guidelines)
| Layer | Application Rate |
|---|---|
| Prime Coat | 0.7 – 1.0 kg/m² |
| Tack Coat | 0.25 – 0.30 kg/m² |
| Dense Bituminous Macadam (DBM) | 110 kg/m³ approx |
| Bituminous Concrete (BC) | 120 kg/m³ approx |
Practical Tips for Engineers
- Always consider wastage of about 3–5% while estimating bitumen quantity.
- Ensure proper surface cleaning before applying tack coat.
- Prime coat should penetrate the granular base layer to bind loose particles.
- Use calibrated bitumen sprayers for uniform application.
- Always follow MoRTH Specifications Section 500 for bituminous works.
Frequently Asked Questions (FAQ)
How much bitumen is required per square meter?
For tack coat approximately 0.25–0.30 kg/m² of bitumen emulsion is required.
How is bitumen calculated for road construction?
Bitumen quantity is calculated by multiplying the road area by the application rate per square meter.
What is the difference between prime coat and tack coat?
Prime coat is applied on granular base layers like WMM, while tack coat is applied between bituminous layers to ensure bonding.
What is the density of bitumen?
The density of bitumen is approximately 1.01–1.06 g/cm³.
—Conclusion
The Bitumen Quantity Calculator simplifies the process of estimating bitumen required for road construction projects. Whether you are working on prime coat, tack coat, DBM, or bituminous concrete layers, accurate calculation helps in proper planning, cost control, and quality construction.
Civil engineers, contractors, and students can use this calculator to quickly determine bitumen requirements and improve efficiency in highway construction projects.
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