How Is Rock Graded?

[olds]

What does "minus" mean in 3" minus?
Which grade of rock (preferably 1" and bigger) has the fewest fines?

 

[Joemonkey]

I have no idea, but that's what I love about ATOT, someone will be in here shortly that knows the exact answer to your question, maybe even 2 that will argue about it

 

[olds]

I have no idea, but that's what I love about ATOT, someone will be in here shortly that knows the exact answer to your question, maybe even 2 that will argue about it

:biggrin:

 

[CVSiN]

whats really funny is the parody thread has 8x the activity of the original.. lol..

 

[lxskllr]

Looks like you'd want #4

http://www.martinstone.com/public/main/4.asp

 

[IronWing]

3" minus means that the the rock contains everything that will pass through a 3" grate. You get stuff up to and a bit bigger than three inches plus the little stuff plus the dust and bug parts.

If you want cleaner rock buy something like 1-3". That will be screen out the small stuff and the dust.

If you want even cleaner rock, order washed rock.

 

[shortylickens]

I have no idea, but that's what I love about ATOT, someone will be in here shortly that knows the exact answer to your question, maybe even 2 that will argue about it

You are the wisest man here!

 

[BoomerD]

What are you doing with the rock? If it's for drainage, washed rock will eliminate nearly all the fines...and since you're talking about 3" minus...nothing in the mix should be smaller than about 2 inches.
If you're talking about "pit run 3 inch minus" then you'll get all the rock, sand, and gravel smaller than a 3 inch nominal size. (will pass through a 3 inch screen sieve.)

(me worked the rock, sand, and gravel industry many, many years ago...back when rock was...rock.)

 

[IronWing]

What are you doing with the rock? If it's for drainage, washed rock will eliminate nearly all the fines...and since you're talking about 3" minus...nothing in the mix should be smaller than about 2 inches.
If you're talking about "pit run 3 inch minus" then you'll get all the rock, sand, and gravel smaller than a 3 inch nominal size. (will pass through a 3 inch screen sieve.)

(me worked the rock, sand, and gravel industry many, many years ago...back when rock was...rock.)

Apparently we're supposed to argue now. But...you're correct. What I described was pit run.

 

[skyking]

3" minus crushed will have all the fines of 1 1/4" minus, typically. You need those to bind the material for road work. It is an odd size though. Common sizes are 3/4", 1 1/4" , 2", and 4" for gnarly road base. There are things like 2" by 4" which has no fines.
<-------I was prepping a roadway and parking lot today for paving

 

[Alone]

Is this thread about crack rock?

 

[IronWing]

Is this thread about crack rock?

If you want it to be.

 

[Joemonkey]

You are the wisest man here!

by the gods! except i should have said "argue or agree"

 

[sjwaste]

Is this thread about crack rock?

Only if you can find a crack rock that passes through a 3" sieve, but not a 1" one, apparently.

 

[olds]

What are you doing with the rock? If it's for drainage, washed rock will eliminate nearly all the fines...and since you're talking about 3" minus...nothing in the mix should be smaller than about 2 inches.
If you're talking about "pit run 3 inch minus" then you'll get all the rock, sand, and gravel smaller than a 3 inch nominal size. (will pass through a 3 inch screen sieve.)

(me worked the rock, sand, and gravel industry many, many years ago...back when rock was...rock.)

The rock is going to be used for loader/dumping practice.
Students will load it into trucks and the student drivers will haul it and dump it back in the stockpile. This times 40 times a day.
The rock we have now has so many fines we have to run a water truck full time.

Thanks all.

 

[skyking]

drain rock would be good for that olds. it has a little dust in it but you can get that washed out at the pile.

 

[DaveSimmons]

Scorpion King = B, his other movies = C - F.

The Mummy 2 is the best movie he was in, but he only had a bit part. Rachel Weisz :wub:

 

[Modular]

Headbangingly awesome to Phil Collins questionable?

 

[eits]

it's probably graded on how high you get after smoking it

 

[BoomerD]

The rock is going to be used for loader/dumping practice.
Students will load it into trucks and the student drivers will haul it and dump it back in the stockpile. This times 40 times a day.
The rock we have now has so many fines we have to run a water truck full time.

Thanks all.

Then just buy something like 2-3 inch washed rock...or 3/4" drain rock, 1-1/2" drain rock, etc. The larger cobble tends to be slightly more difficult to handle...so you COULD get that for the LULZ, but it also beats up a truck bed more.