How To Prepare A Site Before The Concrete Truck Arrives

By Author: Navdeep Sidhu
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Clear a firm path to the pour, brace your formwork, and have every crew member and tool in position before the agitator turns into your street. Once concrete leaves our Broadford plant, you have roughly 90 minutes before it starts to stiffen, so the day is won or lost in the preparation, not the finishing. Here is the checklist we give owner-builders across Central Victoria before we load a truck for them.Quick checklistTruck path clear and firm enough for a 25 to 30 tonne loadSubgrade compacted, graded, and free of standing waterFormwork straight, braced, and coated with release agentReinforcement sitting on bar chairs at the specified coverCrew briefed, tools laid out, washout spot markedMix strength, slump, and cubic metres confirmed with dispatchCan the truck actually reach the pour?A loaded agitator weighs 25 to 30 tonnes and needs about 3.5 metres of solid ground beside the pour because the standard chute only reaches 3 to 4 metres. If the truck cannot get that close, book a line pump before the day, not on the morning of the pour.Walk the exact route the truck will take and be honest about what the ground will carry. ...
... Fresh topsoil, soft lawn, septic tanks, and rain-soaked clay will not hold the weight, and a bogged truck is your recovery bill, not ours. Look up as well as down: the chute and any pump boom have to stay well clear of overhead powerlines, so flag low spans before we arrive. A lot of our concrete delivery around Donnybrook goes into narrow new-estate blocks where the truck simply cannot reach the rear, so we plan a pump into the booking rather than improvising on site.Firm up the ground the day beforeConcrete needs a compacted, well-drained base to sit on. Strip the topsoil, pull out roots and soft spots, compact the subgrade with a plate compactor, and lay a crushed-rock base if the ground holds water. Pump or sweep out any pooled water before we arrive, because a wet base bleeds into the mix and leaves you soft patches.Central Victorian clay is the usual troublemaker here. A day of rain before the pour turns a firm pad into a sponge, so grade the site so water runs away from the pour zone and give it time to drain. If your estate permit calls for water-permeable surfacing on the driveway or paths, that changes the base build-up entirely, and permeable concrete is one way to meet those stormwater conditions. Sort that out at the planning stage, not the day before.Check the formwork and steel before we arriveForms must be straight, level, and braced hard enough to hold wet concrete without bowing or blowing out. Coat the inside faces with a release agent, sit your reinforcement on bar chairs at the cover your plans specify, and then walk the whole zone one more time. Five minutes checking that a bar chair has not tipped or a peg has not lifted saves hours of chipping and patching after the pour.This is also the moment to confirm your slab depth is even across the pad. A driveway that runs from 100mm down to 75mm because the base was never levelled will crack along the thin line within a season, and no amount of good finishing hides it.Have the crew and tools ready to moveConcrete does not wait while someone hunts for a wheelbarrow. Lay out your shovels, rakes, screed board, bull float, edger, and trowels within arm's reach, and give each person a job before the truck backs in: who spreads, who screeds, who finishes. For a standard residential driveway you want at least three able bodies, and more on a hot, windy day when the surface skins over fast.Nominate one person to meet the truck and give our dispatcher their mobile number, not just the site address. When the driver can call the person who is actually standing at the pour, placement starts in minutes instead of the truck idling at the kerb burning your working window.Order the right mix, not just "concrete"Tell dispatch the exact volume in cubic metres, the strength, the slump, and any fibre or colour. Most residential driveways are 25 MPa, stepping up to 32 MPa for heavier vehicle loads, at a slump around 80mm for placing. A house slab is engineer-specified, so read the MPa, slump, and reinforcement straight off your structural drawings rather than guessing.Order slightly over rather than short. Coming up half a cubic metre shy means a second truck for a tiny load and a cold joint where the two pours meet. Our pre-mix concrete is batched to your spec, and a small over-order is cheap insurance. If you want a use for the extra, form up a step or a small pad so the crew can place it before the truck leaves.Set up a washout spotThe truck chute and your tools both need rinsing once the pour is done. Mark a bunded washout spot away from stormwater drains, gardens, and any waterway, where the wash water can pond, soak, and dry out. Wet concrete slurry is alkaline and will kill lawn and clog drains, so this is worth sorting before the truck arrives, not scrambling for a spare wheelbarrow at the end.When to stop and call a professionalBe honest about the job in front of you. A path, a shed pad, or a small mini-mix pour is fair owner-builder territory. A large structural slab, a site with awkward access, or a hot day with an inexperienced crew is where pours go wrong quickly and expensively, because you cannot undo concrete once it is placed. If any of that describes your job, call us before you book the truck and we will talk through the setup, the mix, and whether you need a pump or an extra pair of hands.FAQHow long can the concrete truck wait on site?Plan on roughly 30 minutes of unloading time before waiting charges apply, and remember the whole load has about a 90-minute working life from the plant. Have everything ready so placement starts the moment the truck arrives.Do I need a pump for a backyard pour?If the truck cannot get its chute within about 4 metres of the pour, yes. Booking a line pump in advance is far cheaper than a bogged truck or a load that goes off while you improvise access.Can you deliver on a weekend?Yes. Plenty of owner-builder driveway pours happen on Saturdays and Sundays when the homeowner can be on site. Book a couple of days ahead so dispatch can load the run correctly.