Calculate volume and weight of reclaimed asphalt pavement (RAP) millings for road base applications or recycled asphalt mixes.
RAP (Reclaimed Asphalt Pavement) is material milled from existing roads. It retains residual bitumen and aggregate value, making it ideal for base layers and recycled mixes.
Loose millings: 1700–2000 kg/m³ (bulk). Compacted millings as a base layer: 2100–2300 kg/m³. Select appropriate density for your application.
Using RAP reduces new bitumen requirements by 15–30% and saves virgin aggregate. Significantly lowers the carbon footprint of pavement projects.
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Typical properties of reclaimed asphalt pavement for various use cases.
| RAP State | Bulk Density | Bitumen Content | Typical Application |
|---|---|---|---|
| Fresh loose millings | 1700–1900 kg/m³ | 3.5–6.0% | Stockpile, road base (gravel roads) |
| Aged stockpile millings | 1800–2000 kg/m³ | 3.5–5.5% | Base course, temporary surface |
| Compacted RAP base | 2100–2300 kg/m³ | 3.5–6.0% | Flexible base, sub-base stabilisation |
| RAP in new HMA (15–25%) | 2280–2380 kg/m³ | 5.0–6.0% (blended) | Wearing & binder course overlay |
| High RAP (30–50%) | 2250–2350 kg/m³ | 4.5–5.5% (blended) | Base course, with rejuvenator |
RAP millings are ordered loose (bulk density) and compacted in place to a higher density. Two separate calculations apply — one for ordering, one for in-place volume.
A 200 m² driveway at 100 mm compacted depth, density 1,850 kg/m³: 200 × 0.10 × 1,850 ÷ 1,000 = 37 tonnes compacted. This is what you're buying — the in-place quantity after grading and rolling to design depth.
Millings compact from a bulk density of ~1,200 kg/m³ (loose) to ~1,850 kg/m³ (compacted). The compaction factor is approximately 1.3–1.5×. So 37 t compacted = 37 t ÷ 1,200 × 1,000 = 30.8 m³ loose material to order. Most suppliers quote by the tonne, so 37 t is your order quantity.
At 37 tonnes, with a standard 14 t dump truck payload: 37 ÷ 14 = 2.6 → round up to 3 truck loads. Tri-axle or B-double trucks carry 20–25 t per load, reducing to 1–2 loads. Confirm payload with your supplier — over-ordering 1 truck load is cheaper than a return delivery. Use the Removal Calculator for milling quantities.
When millings are incorporated into new hot mix asphalt (RAP content), the calculation changes. For a 500 t mix batch at 25% RAP: you need 125 t of RAP millings and 375 t of virgin mix components. RAP bitumen content (typically 3.5–5.5%) partially offsets the need for new bitumen binder — use the Material Calculator with the RAP mix type to model the blended material quantities.
RAP millings are one of the most cost-effective pavement materials available — durable, readily available, and environmentally sustainable.
Compacted asphalt millings make an excellent driveway surface at a fraction of new asphalt cost. A standard double driveway (60 m²) at 100 mm compacted depth requires approximately 11 tonnes of millings (1 truck load). Over 6–12 months, the residual bitumen binds under traffic and heat, producing a semi-rigid surface. Cost is typically $0.50–$1.50/sq ft installed versus $3–7/sq ft for new asphalt. Use the Cost Calculator to compare options.
Local councils and rural landowners use asphalt millings to improve unsealed roads, farm tracks, and construction site access roads. At 150 mm compacted depth over 500 m × 5 m, the project needs approximately 693 tonnes. Millings provide far superior trafficability to gravel in wet conditions and reduce dust. Road base costs on low-volume roads can be 50–70% lower using millings versus crushed granite or basalt.
Major road construction and rehabilitation projects incorporate RAP millings back into new hot mix asphalt mixes (typically 15–40% by mass). Austroads, AASHTO, and European EN standards all permit RAP in new asphalt mixes with appropriate blend design and rejuvenator use for high RAP contents. Including 25% RAP on a 1,000 t paving project saves approximately 250 t of virgin aggregate and reduces virgin bitumen demand by 10–15 t. See the Material Calculator to model the RAP mix split.
Input the length, width, and compacted depth of the area to be covered with asphalt millings (RAP). For driveway base use, a compacted depth of 4–6 inches (100–150 mm) is typical. For temporary access roads, 6–8 inches may be appropriate depending on traffic loads and subgrade conditions.
Choose between bulk density (loose millings as delivered by truck, approximately 1100–1300 kg/m³) or compacted density (after grading and rolling, approximately 1700–2000 kg/m³). Use bulk density for ordering from the supplier; use compacted density to calculate final in-place quantities after compaction.
Click Calculate to get total RAP millings weight in tonnes, volume in cubic metres or cubic yards, and estimated truck loads (a standard 10-wheel dump truck carries approximately 12–15 tonnes). Add 10–20% compaction factor when converting from bulk to compacted quantities if ordering loose material.
Asphalt millings (also called Reclaimed Asphalt Pavement or RAP) are produced by cold milling existing asphalt pavement surfaces. The resulting granular material still contains bitumen-coated aggregate and can be reused as: driveway or parking lot base material, temporary road construction, gravel road improvement, aggregate base for new pavement, or reprocessed back into new hot mix asphalt (up to 50% RAP content in some specifications).
Asphalt millings are significantly cheaper than new asphalt. Typical prices range from $10–$30 per ton depending on location and availability. In areas with active road rehabilitation programs, millings may be available free or at very low cost from local highway departments. Delivery costs can add $30–$80 per load. Compacted millings are also much cheaper to install than new asphalt — approximately $1–$3 per square foot versus $3–$7 per square foot for new asphalt.
Yes. Asphalt millings compact and "self-seal" over time as the residual bitumen in the material is activated by traffic and heat. After several months of use and exposure to summer heat, a well-compacted millings surface becomes semi-rigid and sheds water more effectively. Applying a light coat of tack coat or cutback bitumen after final compaction can accelerate this hardening process for high-traffic areas.
For a residential driveway used by passenger vehicles, a compacted depth of 4–6 inches (100–150 mm) over a well-prepared, stable subgrade is recommended. For heavier vehicles (delivery trucks, RVs), use 6–8 inches. The subgrade must be firm and well-drained — millings over soft clay will rut and fail regardless of depth. Placing millings in two lifts (compact each separately) gives better long-term performance than a single thick lift. A 6-inch deep compacted millings driveway over 500 sq ft requires approximately 8–9 short tons.
The terms are used interchangeably in practice. "Asphalt millings" typically refers to material produced by cold milling (planing) an existing road surface — the resulting granular product is delivered directly or stored in stockpiles. "RAP" (Reclaimed Asphalt Pavement) is the broader term that includes both cold-milled material and demolition rubble from full-depth removal. In formal asphalt mix design specifications (Superpave, Austroads), "RAP" specifically refers to this reclaimed material when blended back into new hot mix. The calculator above handles both applications.
Compacted asphalt millings weigh approximately 1.8–2.0 US short tons per cubic yard (2,100–2,300 kg/m³). Loose (uncompacted) millings are lighter at approximately 1.0–1.2 tons/yd³ (1,200–1,400 kg/m³). To convert: for a project requiring 50 compacted yd³ of millings, expect to order approximately 85–100 loose tons from your supplier to allow for compaction. Most suppliers quote by the ton (weight), so confirm whether they're quoting loose or compacted weight. The calculator above works in metric units — multiply cubic metres by 1.308 to convert to cubic yards.