Recycled Asphalt Calculator
Calculate recycled asphalt pavement (RAP), subbase tonnage, and eco-friendly paving material volumes.
= 13.5 Metric Tonnes (7.72 cu yds)
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What Is a Recycled Asphalt Calculator?
A recycled asphalt calculator determines the tonnage of Reclaimed Asphalt Pavement (RAP) for use as high-density subbases, farm roads, and eco-conscious construction. Asphalt is America's most recycled material, with over 100 million tons recycled annually.
How to Use This Calculator
- Enter length and width of the project area in feet.
- Enter the target thickness in inches.
- View the calculated RAP tonnage and cubic yards.
- Review environmental benefits and cost savings compared to virgin aggregate.
Recycled Asphalt Volume Formula
\text{Tons} = \frac{\text{Sq Yds} \times \text{Depth (in)} \times 102}{2000} \times 1.05Uncompacted to semi-compacted RAP averages 102 lbs per square yard per inch of depth (~1.80 tons per cubic yard).
Worked Example
Scenario: Installing a 75 ft by 16 ft RV parking pad with 4 inches of recycled asphalt subbase.
Square footage: 75 × 16 = 1,200 sq ft (133.33 sq yds).
Weight: 133.33 sq yds × 4 in × 102 lbs = 54,400 lbs.
Tonnage: (54,400 ÷ 2000) × 1.05 = 28.56 tons.
Tips & Key Notes
- Recycled asphalt provides a higher California Bearing Ratio (CBR) than virgin aggregate base due to residual asphalt cohesion.
- Apply a diesel or bio-based vegetable oil rejuvenating spray over rolled RAP to reactivate old bitumen bonds.
- Using RAP conserves natural quarry gravel reserves and reduces landfill disposal.
Frequently Asked Questions
Is asphalt the most recycled material in America?
Yes. According to the Federal Highway Administration (FHWA), over 99% of reclaimed asphalt pavement is put back to use in new roads, roadbeds, and shoulders—surpassing aluminum cans and paper.
How much money does recycled asphalt save?
Recycled asphalt is typically 40% to 60% cheaper than virgin crushed limestone or hot mix asphalt.
Can recycled asphalt be mixed with new asphalt?
Yes. Most modern state DOT paving specifications permit 15% to 30% recycled asphalt (RAP) blended directly into new virgin hot mix asphalt.
Does recycled asphalt have weeds grow through it?
Because compacted recycled asphalt forms a semi-solid petroleum-bound crust, it resists weed penetration far better than standard gravel.
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