The concrete truck can't reach the back of the house, the gate is too narrow, and the driveway curves. Or you're in the middle of a rooftop garden with a floor screed to pour and no way to get a large machine in. On these jobsites the mix has to be produced on-site, and the machine carrying it needs to fit wherever a worker with a wheelbarrow can go.
The choice isn't just "mixer yes or no": the drum type matters, whether the machine only mixes or mixes and discharges matters, and whether you'll need the same machine for something else tomorrow matters too.
Fixed drum or interchangeable: the first question
A fixed setup means the machine is always a concrete mixer. Choose it if you need the mixer often, if your jobsites are similar, and if you don't need to use the same machine to haul loose material the next day.
An interchangeable drum, on the other hand, can be removed and replaced with a skip, a tool-carrier plate, or another attachment. Here the machine handles several jobs throughout the week: today it mixes concrete, tomorrow it hauls excavated soil, the day after it loads with a grab. The cost of a second attachment pays off if the jobsite actually calls for it. If the machine will always sit with the mixer on, a fixed setup is simpler to manage.
Where you pour: foundations, curbs, floor screeds with no access
For slab foundations or strip footings in tight spaces, the volume of mix per pour is limited but must be placed precisely. The drum needs to tilt or rotate enough to discharge exactly where needed, without the operator repositioning the machine every time.
For curbs along a driveway or a sidewalk, the discharge point shifts every few feet. Here the advantage of a 180-degree rotating skip — including in the mixer version — is real: you discharge to the right or left without maneuvering the machine in a space that often won't allow it.
For interior floor screeds, access is the main issue. The machine has to pass through a doorway, turn in a hallway, and discharge in a room. The undercarriage width matters, not just the drum: a compact machine with narrow tracks fits where a standard dumper cannot.
In the Cormidi lineup
The Cormidi dumper range offers the concrete mixer as an attachment on three models: C85, C8X, and C200. On the C85 and C8X the drum is in a fixed position; on the C200, which also features a cushioned operator platform, capacity increases and the machine becomes suitable for jobsites where mix volume is higher. For a closer look at how this attachment is fitted and what choosing it involves, the article "Tracked concrete mixer: how it mounts on a tracked dumper and when it makes sense" goes into full detail.
Those who need an interchangeable machine will find the answer in the CMF multi-purpose machine range: the CMF1200, CMF1500, and CMF1600 carry the concrete mixer — in medium or large gross volume — as one of the available attachments, alongside a tipping skip, rotating skip, three-way skip, high-discharge skip, self-loading skip, and tool-carrier plate. Same undercarriage, different attachments depending on the job.
What to check before deciding
Before choosing a model, measure the narrowest gap the machine has to pass through and compare it with the undercarriage width, not the drum width. Then ask yourself how many times a week you actually use the mixer: if the answer is rarely, an interchangeable attachment gives more flexibility. If the answer is almost always, a dedicated setup is more straightforward to use.
Also check the discharge point: if the pour always happens on the same side, a fixed drum is enough. If you're working along a curb or in a space where maneuvering is difficult, a rotating skip or an adjustable drum changes the pace of the workday.
To find the nearest dealer and see the machines in person, visit the Cormidi dealer locator page.
