Concrete roadway and kerb, Wingfield
Concrete roadway and kerb on an industrial site, power-trowelled straight after the pour.

Concrete & civil contractors · Cavan, SA
Slabs, warehouse floors, site cuts and tank removals for homes, businesses and mine sites across SA. Free quotes and site visits.
What we do
Our most requested concrete and civil jobs. All 18 services, from core drilling to tank removal, are on the services page.






Tell us what the job is, where it is and when you need it, and we'll come back with a price. For urgent work, call Roger direct on 0419 313 985.
Prefer to call?
0419 313 985
roger.s@ajcontractors.com.au
Based in
Cavan SA 5094
Hours
Mon–Sat 6:30am–5pm · Sundays & emergencies on request
Service area
Based in Cavan. Jobs within about 20km of the yard carry no travel charge. Further out, the fee is on your quote before you commit.
Concrete roadway and kerb on an industrial site, power-trowelled straight after the pour.
Exposed aggregate driveway, poured and washed back to expose the stone.
Warehouse floor burnished with a ride-on power trowel to a hard, smooth, low-dust finish.
Excavation for an underground storage tank removal on a commercial site.
Concrete bund walls around industrial storage tanks, with the next section's reinforcement laid ready to pour.
Plain concrete driveway with saw-cut control joints, poured to the kerb.
The ground decides the crack
Most failed concrete is a base problem, not a concrete problem. We excavate to depth, bring the base up in compacted layers and check moisture before anything is ordered. On Adelaide's reactive clay that step is the difference between a slab that moves evenly and one that splits in its second summer.
Reinforcement sits where the drawing says
Mesh goes on bar chairs at the specified cover, not dragged up through wet concrete and hoped for. On engineered work we pour to the drawing and leave it exposed for inspection before the truck arrives, so anyone who needs to sign it off can actually see it.
Joints cut on the day, not the week after
Concrete cracks as it shrinks; control joints decide where. We saw-cut to depth as soon as the slab will take a blade, spaced to the panel size rather than to whatever looks even. Cut late and the slab has already chosen its own line.
The finish is matched to the traffic
A burnished warehouse floor, a broomed footpath and an exposed aggregate driveway are three different jobs from the same truck. We agree the finish and the seal before the pour, because the window to change your mind closes about an hour after the concrete lands.
About A&J

Roger has been in concrete since the eighties. In 2020 he and his son Anthony took over A&J, and they run it as a family business with the owners on the tools, rather than a name on a truck and whoever is available that week.
It means Roger answers his own phone, quotes the job himself, and is usually on site while it is being poured. If something needs deciding halfway through, you are talking to the person who will be standing in it, not to an office.
Who you'll deal with
Roger takes the call and prices the work. Anthony runs the crew. Between them they are on nearly every job.
Sized to the job
Big pours and civil jobs get the extra hands they need, with Roger and Anthony running the site from start to finish.
What we take on
Driveways and slabs through to warehouse floors, and civil work on mine sites in SA, WA and the NT. If it is not our kind of job we will say so.