How much stone will i need?

[SteveT]

was wondering what amount of stone you guys reckon i will need for a new lane i am putting in. At the moment i only need to put in a bare bones of a road (until i hopefully get planning then i will improve the road further). Problem its 800m by 3.5m going onto a field. I'm going to pull off topsoil down to the clay with the track digger. Rang around and got some brilliant prices choice is quarry run or proper crushed stone which is 25% dearer.
The quarry run i am told is pretty good nothing too big biggest is the size of your head down but on the crushed stuff i have the choice of 2 or 4 or 6 inch down or clean or anything else at the same price which i think might work out cheaper as less might be needed. I am guessing but reckon i will need 600ton+. Is there any formula to work it out. Or anyone got any experience of this type of job.

[Willis Bushogin]

was wondering what amount of stone you guys reckon i will need for a new lane i am putting in. At the moment i only need to put in a bare bones of a road (until i hopefully get planning then i will improve the road further). Problem its 800m by 3.5m going onto a field. I'm going to pull off topsoil down to the clay with the track digger. Rang around and got some brilliant prices choice is quarry run or proper crushed stone which is 25% dearer.
The quarry run i am told is pretty good nothing too big biggest is the size of your head down but on the crushed stuff i have the choice of 2 or 4 or 6 inch down or clean or anything else at the same price which i think might work out cheaper as less might be needed. I am guessing but reckon i will need 600ton+. Is there any formula to work it out. Or anyone got any experience of this type of job.
I dont know metric, so I can help on the total amount, but I will say use a base rock, like a 4" rock. If you just much smaller it will disappear, into the soil. Come back with a smaller rock like a 1"
I just the 4" and dont put anything until after the job is over. Like build the road access to where you are going to build a house, etc, do all the work and then come back with the smaller rock to dress up the top of the driveway.
Im not familiar with your type of soil, but you must have bad soil to have to dig out 6" and back fill with rock

[clansing1]

The three most important things to remember when building a road:
1) Water
2) Water
3) Water

The road should be raised allow proper drainage and to keep the rock base of the road away from any water. The thickness of the rock that is needed for the road depends on the strength of the soil subbase and the amount of moisture in it. After stripping the topsoil, you can proof roll the soil with a tandem dump truck that is half loaded to see if you have any soft spots.

The best material and most cost effective rock base material is usually a quarry run or shot rock material. If you lay down 10-12" of quarry run and dress it up with a couple inches of 3/4" w/ fines, you should have a pretty good road. Just remember, do it right the first time, it is much more costly to redo it or make repairs.

Also, the larger the size of the rock aggregate, the more bearing capacity the rock base with have, and the more the road will be able to hold. I would use the 6" minus myself.

The amount of rock needed in my estimate:

880 M = 2625 feet
3.5 M = 11.5 feet

Cubic feet of rock = L*W*H = 2625 ft * 11.5 ft * 1 ft = 30,187 cubic feet

Cubic feet of rock/27 = cubic yards = 30,187/27 = 1183 cy

CY of rock * 1.7 = Tons of Rock = 1183 * 1.7 = 1900 tons of 6" minus at 12" thick

Tons of 3/4" Rock @ 2" thick = 1900/6 = 317 Tons of Rock @ 2" Thick

The tons are in short tons, not metric tons. Mulitply by 0.907 to convert short tons to metric.

The 1.7 is what I use to convert cy to tons with rock. It also includes a waste factor.

Hope this helps.

[Acivil]

You have to calculate the volume of stone you want to use then convert it into weight. Different Stone Grades have different conversions as their densities are not the same. Typically, crushed/washed stone will convert at 1.6-1.8 tons per yard. Crusher Run, or DGA will convert more like 1.9-2.1 tons per yard.