Asphalt Ordering and Loads

An asphalt order needs more than one tonnage total. Keep the measured mass, documented allowance, supplier rounding, delivery events, and truck-cycle plan on separate lines.

This separation shows why the order changed and prevents the same uncertainty from being added twice. It also gives the supplier, carrier, paving crew, and quantity checker a common record before the first load leaves the plant.

How much extra asphalt should you order?

No universal extra percentage fits every paving job. Start with the checked measured mass, then add an allowance only when a project record identifies the reason and amount. Round once to the supplier's current selling increment.

Confirm the final mass, mixture, minimum order, increment, partial-load terms, load size, dispatch schedule, route, access, and ticket procedure with the supplier and carrier. The Asphalt Calculator keeps these quantity stages visible.

Which number belongs on the asphalt order?

The supplier-rounded order mass comes after the measured quantity and any approved allowance. Preserve all intermediate values so another person can reproduce the result.

Use the Asphalt Density and Weight Guide before mass calculation when the density record is unresolved. Use the Asphalt Thickness guide to identify compacted depth and separate lifts.

How do allowance and supplier rounding work?

Apply a documented allowance to the measured mass. Apply supplier rounding to the planning mass after the allowance.

Planning mass = measured mass × (1 + allowance ÷ 100)

Supplier order = ceiling(planning mass ÷ increment) × increment

Example: measured mass is 41.76 t. A project record supports a 4% allowance, and the supplier quotes 0.5 t increments.

1. Allowance mass: 41.76 × 0.04 = 1.6704 t.
2. Planning mass: 41.76 + 1.6704 = 43.4304 t.
3. Supplier order: 43.4304 t rounded up to 0.5 t = 43.5 t.
4. Supplier rounding added 43.5 − 43.4304 = 0.0696 t.

The 4% allowance and 0.5 t increment belong to this arithmetic fixture. They do not prescribe values for another project, mixture, producer, or market.

Which changes belong in measured mass?

Revise measured mass when the physical scope or mass conversion changes. Preserve the prior result and identify the source revision.

Example: a field revision adds 2.32 t to the 41.76 t measured quantity. Revised measured mass is 44.08 t. Applying the same stated 4% example allowance gives 45.8432 t, which rounds to 46.0 t at the same 0.5 t increment.

Adding 2.32 t inside the allowance would hide the changed physical scope. Keep the revision in measured mass and retain the drawing, survey, field record, or instruction that supports it.

Does compacted asphalt need a second compaction allowance?

A mass calculation based on compacted volume and matching compacted density already describes the finished compacted material state. Adding a separate compaction multiplier would count that state change again.

Loose screed setup remains a separate paving-control record. The selected mixture's rolldown behavior does not create mass; it changes the relationship between loose and compacted volume. Confirm that the volume and density use the same state before adding any project allowance.

A changed finished depth, leveling requirement, or measured surface belongs in the base takeoff. Record that geometry change directly rather than describing it as compaction waste.

How many asphalt delivery loads are required?

Divide the supplier-rounded order by the confirmed usable mass per delivery, then round up to a whole delivery event. The final load can be partial only when the supplier and carrier allow the proposed quantity and terms.

Whole delivery events = ceiling(supplier order ÷ usable mass per delivery)

For the 43.5 t example, a confirmed usable mass of 20 t gives 43.5 ÷ 20 = 2.175, so arithmetic planning shows 3 delivery events. A possible split is 20 t, 20 t, and 3.5 t.

That split is not a dispatch instruction. The supplier may apply a minimum, partial-load fee, different batch or scale increment, production constraint, or another commercial rule. The carrier must confirm vehicle, route, legal mass, axle limits, access, unloading, and current operating conditions.

The Asphalt Coverage per Ton guide can convert an accepted load mass back to a theoretical area when density and compacted depth are known.

Is delivery count the same as the number of trucks?

Delivery count measures how many load events carry the order. Rotating-truck count measures how many vehicles are needed to maintain a target flow while each vehicle completes its cycle.

One truck can make several delivery events during a shift when cycle time and schedule permit. Several trucks can also deliver one load each. Keep vehicle identity, load identity, and ticket identity separate.

How is an asphalt truck cycle calculated?

Add every timed part of one complete cycle. NAPA lists loading and ticketing, tarping, outbound haul, site time, dumping and cleaning, and the return haul among the possible components.

Cycle time = load and ticket + tarp + outbound haul + site wait + dump and clean + return haul

Loads per hour = target mass per hour ÷ average accepted load mass

Minimum rotating trucks = ceiling(cycle minutes ÷ 60 × loads per hour)

NAPA says the whole-truck result rounds up. Use current observed or confirmed times for the selected plant, route, shift, site, paver, and fleet. Traffic, queues, plant demand, staging space, weather, access, inspection, cleaning, and breakdowns can change the cycle.

Worked truck-cycle example

A planning fixture uses a target delivery rate of 90 t/h, an average accepted load of 18 t, and a complete cycle time of 72 minutes.

1. Loads per hour: 90 ÷ 18 = 5.
2. Target delivery interval: 60 ÷ 5 = 12 minutes.
3. Cycle hours: 72 ÷ 60 = 1.2 hours.
4. Rotating trucks: 1.2 × 5 = 6 trucks.

If the planned shift quantity is 360 t, the same 18 t average gives 360 ÷ 18 = 20 delivery events. Six rotating trucks can produce those 20 events over the shift when the assumed cycle and operating rate hold.

The 90 t/h rate, 18 t average load, 72-minute cycle, 360 t shift, 6 trucks, and 20 events belong to this fixture. They do not approve a production plan, vehicle fleet, route, shift length, paving speed, or delivery interval for another job.

Should the truck plan include a cushion?

A fleet cushion is a separate operating decision. NAPA's Efficient Trucking report describes options such as adding cushion time to the cycle or adding a truck, and it notes that rounding can already create spare capacity.

Record the reason for any added vehicle: travel-time variation, plant queue, fleet reliability, site delay, or another observed risk. Compare the cost and expected effect against current project data. Do not convert an extra truck into extra asphalt mass.

Recheck the fleet calculation when the target rate, average load, route, plant, paver, shift, traffic window, site access, or cycle observation changes. A dispatch board should show planned and current arrival intervals rather than a fixed truck count copied from another job.

Which supplier details should be confirmed before dispatch?

Obtain a current written record for the selected mixture and delivery window. Verbal shorthand can leave mass units, minimums, and final-load treatment unresolved.

• Exact mixture designation and approved use.
• Mass unit: U.S. short ton, metric tonne, pound, or kilogram.
• Order increment, minimum order, and scale precision.
• Full-load and partial-load terms, fees, and final-load procedure.
• Plant production slot, opening time, expected rate, and silo context.
• Vehicle types, confirmed usable load mass, route, permits, axle and legal limits.
• Site access, staging, truck exchange, unloading, cleaning, and departure route.
• Ticket fields, acceptance process, rejected or returned material procedure, and contact names.

NIST defines 1 U.S. short ton as 2,000 lb and 1 metric tonne as 1,000 kg. Confirm the supplier's unit when the order or ticket uses the word ton without a qualifier.

How should delivery tickets close the order?

Track each ticket by load, mixture, unit, source, time, location, acceptance status, and assigned lift or section. Add accepted masses only when they belong to the same defined order balance.

FHWA contract-administration guidance discusses validation of haul-ticket source documents at loading and delivery in its federal-aid context. FHWA's e-ticketing example shows how electronic records can connect arrival, placement, bid item, time, and load information.

Example: accepted tickets of 18.2 t and 17.8 t total 36.0 t. Against the 43.5 t current order, the arithmetic balance is 7.5 t.

Remaining accepted mass = current approved order − accepted assigned ticket mass

Keep a rejected 0.4 t load outside the accepted total until the project record resolves replacement, payment, disposal, and quantity responsibility. Returned, diverted, duplicate, sampled, spilled, leftover, and unassigned material also need explicit status.

How should each paving shift be closed?

Reconcile the current order, dispatch log, ticket set, paved limits, work status, retained material, and unresolved differences before the next shift calculation. Preserve the cut-off time and the person responsible for each open item.

A ticket total does not prove compacted depth, density acceptance, finished elevations, smoothness, or pavement performance. Use the governing tests, measurements, specifications, and acceptance records for those decisions.

Which asphalt ordering mistakes change the plan?

• Using a fixed waste percentage without a documented project reason.
• Adding compaction again after compacted volume and density already define the mass.
• Hiding a revised area, depth, mixture, or density inside the allowance.
• Rounding each section before compatible measured quantities are combined.
• Combining allowance and supplier increment into one unexplained number.
• Treating nominal truck capacity as confirmed legal and usable load mass.
• Confusing delivery events with the number of rotating vehicles.
• Leaving plant time, site wait, unloading, cleaning, or return travel out of the cycle.
• Counting rejected, returned, diverted, or duplicate tickets as accepted mass.
• Using the ticket balance as proof of pavement acceptance.

Safety, commercial and specification limits

Hot asphalt, fumes, delivery traffic, reversing vehicles, pavers, rollers, blind spots, live roadways, queues, cleaning, heat, noise, and poor visibility require the applicable safety plan, traffic control, trained spotters, communication procedure, PPE, exclusion zones, and equipment instructions. OSHA identifies asphalt-fume exposure as a worker-safety concern.

This guide does not select a mixture, design pavement, prescribe allowance, approve an order, set price, schedule a plant, assign a carrier, confirm payload, plan traffic control, set temperature limits, choose paving speed, approve tickets, determine payment, or verify acceptance. Current contracts, supplier and carrier confirmations, project documents, site conditions, laws, permits, and qualified decisions control those tasks.

Return to the Asphalt planning tools and guides for the category record. The calculation methodology explains source, unit, assumption, precision, and rounding checks. Report a source or calculation issue through the corrections route.