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Rock And Gravel Names

 
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Old 04-30-2015, 01:29 PM   #1
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Rock And Gravel Names


Just looking for a little clarification on all the different names and colloquialisms for gravel types.

The kind I work with most often is just called "Base Rock." We use it under slabs and for short driveways and such. It's about 3/4" and less, with graduated fines, so it compacts very well. Not sure if this is the same aggregate mix for concrete, but it looks similar.

Then there is "River Run", "Crusher Run", and "Quarry Run". My understanding is the River Run is just what comes off the riverbar, without any grading. Usually it's pretty sandy, with some larger, round aggregate. But it varies considerably. It doesn't seem to have a standard.

I'm not sure what Crusher Run is. I assume it's what comes out of the crusher, ungraded. Haven't used it too much.

Quarry Run, is I assume, what comes from the quarry, ungraded. The stuff I've seen looks like Base Rock, just larger aggregate.

Then guys will talk about "1 1/2" minus", or "3/4" minus", and so on. I've never really understood that. I think it's graded, like base rock, but I'm not sure. I think it also applies to Quarry and Crusher Run types.

Some guys talk about a "Type 2" or a "Type 3" rock. I don't think it's the same as a #2, or #3, which I understand is a single-size aggregate.


Sorry for the long post, I've been wanting to put this up here for a while. If anyone wants to shed some light on this, I would be grateful.





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Old 04-30-2015, 02:28 PM   #2
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Re: Rock And Gravel Names


3/4 Minus is what I'm most familiar with, and that is typically used for sub bases. It's material that is screened through a 3/4" screen, plus sand for compaction.
Pit run is also common here, and that is 3" minus screened material.
Other than that I've used pea gravel (1/2" screened and washed), and river rock (up to 3" clean screened rock).

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Old 04-30-2015, 03:28 PM   #3
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Re: Rock And Gravel Names


Quote:
Originally Posted by Seven-Delta-FortyOne View Post
Just looking for a little clarification on all the different names and colloquialisms for gravel types.
It may not be possible. Since the names are unreliable/inconsistent, start here. . .

http://en.wikipedia.org/wiki/Gravel
from
http://www.google.com/search?client=...UTF-8&oe=UTF-8

I guess I'd name the application and ask what form of gravel is suitable. There must be reasons for so many processing methods and types.

The function is to provide drainage, to spread the downward force evenly and be resistant to freeze/thaw cycles? Anything else?

Last edited by GettingBy; 04-30-2015 at 03:38 PM.
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Old 04-30-2015, 04:01 PM   #4
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Re: Rock And Gravel Names


You'll never get them all figured out, there is a different name/number pretty much everywhere. Around here there are:
GAB- graded aggregate base with probably 1-1/2" minus down to stone dust
CR6 & CR-8- almost the same as gab little different sizing
In virginia the similar material is called 21A
All the road base around here come out of the quarry wet, they keep water on it in the stockpiles, helps it to lock together.

Crushed stone comes in sizes #1,2,57,7,8, etc all clean and pretty uniform sizing

When you say gravel around here it is the rounded "bank run" that would be pulled from river or similar not crushed with sharp edges

We also get into stone dust (finely crushed stone), rip rap, gabion, concrete sand, silica sand, .......

Material itself is Always different depending on location and even different per quarry from the same general location. We try to use one specific quarry for our road base because it goes together so well and gets like concrete almost after a few wet/dry cycles.

I think you are fighting a losing battle if you are trying to figure it out for multiple states/locations, but good luck!
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Old 04-30-2015, 06:12 PM   #5
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Re: Rock And Gravel Names


Great thread !, Looking to learn here guys. I love Ct what a great resouce, And fun to read.
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Old 04-30-2015, 06:48 PM   #6
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Re: Rock And Gravel Names


A lot of guys around here call your base rock, "processed" or "base" so it would be "3/4 processed" or "3/4 base".
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Old 04-30-2015, 06:57 PM   #7
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Re: Rock And Gravel Names


I been using a bunch of that type 57 behind my retaining wall. The only other type I have used it Crusher run which seems to compact a lot better into a hard base compared to the type 57 which I was told was bad for drainage so use the 57 instead.
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Old 04-30-2015, 07:29 PM   #8
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Re: Rock And Gravel Names


Quote:
Originally Posted by Moxley-Kidwell View Post
You'll never get them all figured out, there is a different name/number pretty much everywhere.

I think you are fighting a losing battle if you are trying to figure it out for multiple states/locations, but good luck!
That's kind of what I figured. Unless it has an ASTM Designation and Spec's, it's sort of a local thing.

Some guys will call something "Crusher Run" one minute, and "1 1/2" minus" the next, or some such thing.

Gets confusing for a guy who only uses a couple different types, from pretty much 1 or 2 suppliers.


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Old 04-30-2015, 08:39 PM   #9
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Re: Rock And Gravel Names


Awesome thread, definitely going to use this for future references
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Old 04-30-2015, 08:47 PM   #10
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Re: Rock And Gravel Names


rip rap has always been interesting to me. I know it as stone that is placed on the side of a riverbed to help stop erosion. Not so much of a what as a how, why and where.
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Old 04-30-2015, 08:54 PM   #11
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Re: Rock And Gravel Names


Quote:
Originally Posted by Seven-Delta-FortyOne View Post
Some guys will call something "Crusher Run" one minute, and "1 1/2" minus" the next, or some such thing.
sounds like the crusher run IS 1 1/2" minus.

minus and clear are the only ones I truly understand. Minus means EVERYTHING that comes out of the crusher that fits through a 1 1/2" screen. So 1 1/2", 1" 3/4" 1/2" 3/8" 1/4" and all levels of stone dust.

Clear is whatever is between that size and the next size down. So 3/4 clear would have stone that passes through the 3/4" screen but not the 1/2" screen

we have here what we call GA...it's just stuff
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Old 04-30-2015, 08:58 PM   #12
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Re: Rock And Gravel Names


Around here the old timers call 3/4 Graded Base, Starpack.
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Old 04-30-2015, 09:07 PM   #13
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Re: Rock And Gravel Names


Here we have 21a, 21aa, 22a, 22aa, 1x3, rip rap, pea stone, and a few others. I need a chart when I purchase stone
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Old 04-30-2015, 09:48 PM   #14
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Re: Rock And Gravel Names


Quote:
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rip rap has always been interesting to me. I know it as stone that is placed on the side of a riverbed to help stop erosion. Not so much of a what as a how, why and where.
Everywhere I've worked, rip-rap was stone over 500 lbs each.



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Old 04-30-2015, 09:51 PM   #15
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Re: Rock And Gravel Names


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sounds like the crusher run IS 1 1/2" minus.

minus and clear are the only ones I truly understand. Minus means EVERYTHING that comes out of the crusher that fits through a 1 1/2" screen. So 1 1/2", 1" 3/4" 1/2" 3/8" 1/4" and all levels of stone dust.

Clear is whatever is between that size and the next size down. So 3/4 clear would have stone that passes through the 3/4" screen but not the 1/2" screen

we have here what we call GA...it's just stuff
Sometimes just writing down what you know helps to clear things up a bit.

I think something like "Crusher Run" designates where it came from. "3/4" minus" would designate what it's actual make-up is.



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Old 05-01-2015, 06:10 AM   #16
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Re: Rock And Gravel Names


Quote:
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Everywhere I've worked, rip-rap was stone over 500 lbs each.



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Old 05-01-2015, 06:27 AM   #17
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Re: Rock And Gravel Names


They use it here to line the lake shore front. Kind of looks like this stuff. Come larger or smaller than this too.

Rock And Gravel Names-imageuploadedbycontractortalk1430479661.546840.jpg
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Old 05-01-2015, 06:40 AM   #18
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Re: Rock And Gravel Names


Right, its put at water lines to stop erosion. I suppose it could be used anywhere for erosion control but historically it's used along river banks etc...That's why I say it's not so much defined by what it is as how it's used.
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Old 05-01-2015, 08:26 AM   #19
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Re: Rock And Gravel Names


Around here nothing is tightly spec'd so there's 5/8 top course, 1 1/4 base course, and that's about it. It was different in the Seattle area, but I didn't haul rock then.
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Old 05-01-2015, 02:25 PM   #20
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Re: Rock And Gravel Names


There is Nominal (like a 2x4) and Actual: 1.5 x 3.5
but with gravel it's about as confusing as I've ever seen.

IMO, your particular application should drive your choice.

This guy
http://www.google.com/search?q=linde...TF-8&oq=&gs_l=
might have some words of wisdom on the civil or mech engineering uses for gravel. My local library has several of his books on PE Exams.

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