If you are tearing out a driveway, a patio, a foundation, or a section of retaining wall, the debris you are generating behaves nothing like the debris from a kitchen remodel. Understanding why saves real money, and more importantly it keeps a truck from showing up to a container it cannot legally haul.
The weight problem, in plain numbers
A cubic yard of mixed construction debris weighs a few hundred pounds. A cubic yard of concrete weighs roughly two tons.
That difference is the entire story. A 20-yard container holds 20 cubic yards of volume, but the truck that carries it has a legal axle weight limit set by the state, not by the size of the box. Fill a 20-yard container with concrete and you are looking at something in the neighborhood of 40 tons, which is dramatically beyond what any roll-off truck can legally move.
This is why a driver will sometimes look at a container and tell you it cannot go. It is not a judgment call about whether the truck could physically lift it. It is a question of whether the loaded truck is legal on a public road, and the answer is enforceable at a weigh station.
What a heavy-debris container looks like
The industry solution is a small container with a fill line. Typically a 10-yard box, and you load it to a marked line rather than to the top rails.
It feels wasteful to leave two thirds of a container empty. It is not. You are not renting volume in this case, you are renting weight capacity, and the small box exists specifically so that a full legal load fits in something a driver can safely handle.
Clean loads are worth the sorting
Here is where heavy debris gets genuinely favorable, and where most people leave money on the table.
Disposal facilities distinguish between a clean load and a mixed load. A clean load is a single material with nothing else in it. Clean concrete. Clean dirt. Clean brick. Clean asphalt.
Clean material can be crushed and recycled into road base and fill. Mixed material has to be sorted or landfilled. Because recycled aggregate has real value, clean loads are typically accepted at a meaningfully lower rate than mixed construction debris, and sometimes at recycling facilities rather than landfills entirely.
What ruins a clean load is depressingly small. A few chunks of wood forming, a length of rebar sticking out, the plastic sheeting that was under the slab, a couple of bags of trash somebody tossed in at the end of the day. Once contamination is in the pile, the whole load is graded as mixed.
If you are demoing a concrete driveway, keeping it clean means exactly one rule: nothing but concrete goes in that container. Put a separate trash can next to it for lunch wrappers and everything else.
Rebar, mesh, and what counts as clean
Concrete with rebar in it is usually still acceptable as a clean load, because crushing operations have magnets and expect to recover steel. What causes problems is loose rebar, long pieces sticking out past the container rails, or wire mesh balled up on top.
The practical rule is that reinforcement embedded in the concrete is fine, and reinforcement floating loose on top is not.
Dirt has its own quirks
Dirt seems like the simplest possible material, and it mostly is, with two wrinkles.
Wet dirt is far heavier than dry dirt. If you excavate after a week of rain, you may be moving nearly twice the weight for the same volume. Scheduling around the weather genuinely matters on a dirt job.
Not all dirt is clean fill. Soil from a site with a history of fuel storage, or soil mixed with construction debris, gets handled differently. If there is any question about what was on the property before, raise it early rather than at the scale house.
Sizing a heavy-debris job
The honest answer is that it depends on the thickness of what you are removing, and most people underestimate.
A residential driveway is commonly four inches thick. A patio might be three to four. A garage slab or a commercial pad can be six inches or more, often with heavier reinforcement. When you are estimating, measure the area and get the thickness right, because doubling the thickness doubles the weight.
If you are not sure, tell us the dimensions of the slab and what it was used for, and we will work out the number of hauls. That is a far better use of five minutes than discovering mid-project that you need three more pulls than you planned.
The short version
- Heavy material goes in a small container loaded to a fill line, not a big container loaded to the top.
- Keep it clean, with one material and nothing else, and it is handled as recyclable aggregate rather than landfill debris.
- Weight is set by road law, not by the size of the box.
- Wet material weighs substantially more than dry.
If you are planning a concrete, dirt, or masonry removal in the Fort Worth area, describe the slab and we will tell you what we would send and how many pulls it is likely to take.