Crushed rock aggregate on driveway - how many tons? (2023 Update)

[me9]

And it's missed out the density of the rock.

[Rod Speed]

Ypu're 10 years late, stupid.

[jim.gm4dhj]

type waaaaaaaaaaaaaaaaaaaaaan

[jim.gm4dhj]

late late never too late

[Rod Speed]

Tad unlikely that the OP is still waiting for that spammer/aibot to show up

[Brian Gaff]

I just wish people would not use loose fitting surfaces on their driveways and hard standings, anas almost from day one, where the drive crosses the footway, which is normally concrete, the loose surface gets moved onto that part and causes a problem for pedestrians who start to slip and slide on the ball bearing sized bits that end up there. This means constant sweeping back onto the drive, and constant loss of the drive. Brian

[Harry Bloomfield Esq]

+1

[Sargan]

or a lot easier go to Paving Expert and use the on screen calculators

[Andrew]

This is a real problem when people use pea-shingle which is the wrong stuff. It is small enough to get into tyre treads and slowly disappears onto the pavement and road as you have discovered.

Limestone chips are also useless because the vehicle weight crushes it over time and rain then turns it into bad concrete infiltrated with moss and looks awful.

The correct size of stones/cobbles to use is 20 to

30 mm. These stay in place (mostly).

Andrew

[Rod Speed]

No one does domestic driveways like that.

[Brian Gaff]

Hmm, so does somebody sit there measuring each bit one at a time? Brian

[Brian Gaff]

Oh yes they do, loads of them. The council control the bit up to the boundary, but the owners seem to do as they like thereafter, making a heck of a mess and its dangerous. Brian

[Paul]

At the crusher plant, there are grading screens for sorting product.

Not only the size of the stone matters. The shape of the stone matters. The machine type, determines the rock-shape.

The article here (a "cheaper by the ton" article), describes some of the methods. There are crushers and grinders.

Even the location of the facility, is variable. You've probably seen a central quarry provide materials for a metropolis. But "portable" plants can be located next to a rock face, during highway construction, and then the dump trucks hauling gravel, only have to drive a few kilometers per load. Some of our highways here, the gravel bed is unbelievably thick ("expensive looking"). Whereas secondary roads or city roads, can be of lesser quality.

The thickest road bed I know of, is when a section of highway has a "frost heave" problem. They remove six feet of clay underneath the road, and replace with gravel. And rebuild the road substrate to remove the heave-materials.

One road with a heave problem, the road lifts up so much, if you drive over the road surface at posted speed, your vehicle becomes airborne (you can see light under all four wheels of the vehicle ahead of you). That's to give you some idea just how dangerous those are. If you drive slowly towards the "launch point", you can see a rust stain, where the vehicles bottom out on the paving and scrape the rust off some part of the vehicle. This is how you lose the screw off your oil pan.

Paul

[Rod Speed]

Brian Gaff [e-mail] wrote

They invented these funky things called mesh screens to do that quite some time ago now.

[Rod Speed]

Brian Gaff [e-mail] wrote

Bullshit with stones that big.

Stones that big aren't dangerous.

[alan_m]

Try following traffic when stones of that size have been dropped on the roadway.

[Rod Speed]

alan_m [e-mail]> wrote

They won't get on to the roadway.

[Rob Morley]

He's leftpondian. It's good advice for there, which is more than can be said for the "Home Owners Hub Adviser", but it's just self advertising (I stop short of calling it spam).