Volumetric vs Drum Mixers — Which Delivers Better Concrete

Every contractor in the GTA has an opinion on this. Some swear by drum trucks. Others won’t order anything but volumetric. The truth is, both have a place — but if you’re picking the wrong one for your job type, you’re either wasting concrete or wasting money.

Here’s a no-nonsense breakdown of both, based on how they actually perform on GTA job sites.

How Drum Mixers Work

The traditional drum truck — the one you’ve seen a thousand times on the 401 — is a transit mixer. The concrete is batched at a plant, loaded into the rotating drum, and delivered to your site. The mix is already done when it arrives.

What Drum Trucks Do Well

Large volume pours. If you’re pouring 8+ cubic metres for a foundation or a commercial slab, a drum truck is the standard. They carry 7–10 cubic metres per load, and for high-volume jobs, the batch plant can crank out consistent mix after consistent mix.
Consistent plant-batched quality. The mix is weighed, tested, and batched in a controlled environment. For spec-critical work — structural foundations, public infrastructure — this matters.
Availability. There are more drum trucks on the road in the GTA than volumetric units. During peak season (June–September), you’ll have an easier time booking a drum truck.

Where Drum Trucks Fall Short

Minimum orders. Most GTA ready-mix plants have a minimum order — typically 3–4 cubic metres. If your pour is 1.5 cubic metres, you’re paying for 3 and dumping the rest. That’s not a rounding error — that’s $400–600 thrown away on a small residential job.
The clock starts ticking. Once concrete leaves the batch plant, you typically have 60–90 minutes before it starts setting up. In GTA traffic — particularly on the QEW, 401, or 410 during peak hours — that window can get tight. If you’re pouring in downtown Mississauga during rush hour, the truck might burn 40 minutes just getting to your site.
No adjustments on site. What’s in the drum is what you get. If you need the mix slightly wetter, or you want to add fibres, or the job conditions change — too bad. The mix is set at the plant.
Waste. Anything left in the drum after your pour is waste. The driver has to wash out somewhere, and you’re paying for every cubic metre that was loaded, whether it hits your forms or not.

How Volumetric Mixers Work

A volumetric mixer carries raw materials — cement, aggregate, sand, water, and admixtures — in separate compartments on the truck. The concrete is mixed on site, on demand, to the exact quantity you need.

What Volumetric Trucks Do Well

No waste. You order 2.3 cubic metres, you get 2.3 cubic metres. The mixer only produces what you need. For small to mid-size pours — driveways, sidewalks, garage pads, curbs — this is where volumetric saves serious money.
Mix flexibility. Need to adjust the slump on site? Add fibre? Switch from 25 MPa to 32 MPa between pours? The operator dials it in right there. No second truck, no callbacks to the plant.
No time pressure. There’s no setting clock running. The concrete is fresh-mixed as it’s poured. If your crew needs a break, if the forms aren’t ready, if you need to wait for an inspection — no problem. The mixer waits.
Multiple pours, one truck. If you have three small pours across one job site — say, a walkway, a set of stairs, and a pad — one volumetric truck handles all three with different mixes if needed. One dispatch, one mobilization cost.

Where Volumetric Falls Short

Large volume limitations. A volumetric truck typically carries enough material for 8–10 cubic metres. For a 40-cubic-metre commercial foundation, you’d need multiple reloads. A drum truck operation with a steady flow of trucks from the plant is faster and more efficient at that scale.
Operator skill matters. The quality of a volumetric pour depends heavily on the operator calibrating the mix correctly. An experienced operator produces concrete that’s every bit as good as plant-batched. An inexperienced one can produce inconsistent results.
Fewer units available in the GTA. Volumetric trucks are growing in popularity, but there are still far more drum trucks on the road. During the busiest weeks of summer, booking a volumetric unit can be tighter.

When to Use Which — A GTA Contractor’s Guide

Use Volumetric When:

Your pour is under 5 cubic metres
You’re doing multiple small pours on one site
You need mix flexibility (different strengths or slumps in one visit)
The job site is hard to access and a full drum truck can’t get in
You’re working on a residential driveway, walkway, or pad in Mississauga, Brampton, or Pickering
You want to avoid paying for minimum orders you don’t need

Use Drum When:

Your pour is 8+ cubic metres
The job spec requires plant-batched, tested concrete with full batch tickets
You’re pouring structural foundations, commercial slabs, or public infrastructure
You need continuous high-volume delivery with multiple trucks in sequence
Your site has good access for a 10-wheel truck and the pour is straightforward

The Cost Comparison

On a small residential pour — say, a 3-metre driveway pad in Brampton — the numbers typically look like this:

Drum truck:

Minimum order: 3 m³ (even if you need 2)
Delivery fee: $80–150
Concrete: ~$250/m³ × 3 = $750
Waste disposal for excess: $50–100
Total: ~$880–1,000

Volumetric:

Exact order: 2 m³
Mobilization fee: $150–250
Concrete: ~$280/m³ × 2 = $560
Waste: $0
Total: ~$710–810

The per-cubic-metre rate is higher with volumetric, but you’re not paying for concrete you don’t use. On small jobs, volumetric almost always comes out cheaper.

On a large commercial pour — say, 30 cubic metres — drum trucks win on efficiency and per-unit cost every time.

What We Run at 2AZ

Our ready-mix division operates volumetric mixers across the GTA. For most residential and light commercial work — the kind of jobs GTA contractors handle every week — volumetric is the better tool.

If your project calls for a large plant-batched pour, we’ll tell you that. We’re not going to push a volumetric job where a drum truck makes more sense. But for the 1–8 cubic metre pours that make up the bulk of residential and small commercial work across Mississauga, Brampton, Pickering, and the surrounding 905, volumetric saves you money and eliminates waste.

Need a pour? Get a quote or call us at 647-926-2597.