Anybody ever used 6"- cobble in road building before? Is it a good idea for a turnaround with heavy truck traffic on it? Your opinion is important to me I need you guys to at least vote yes or no and if you feel like it tell me why and maybe state your work experience... This will help me out big time! the more votes the better
We have been building Logging roads for years with this stuff, hell out in no mans land there are no Rock crushing plants to make the crushed product …. we take from Borrow pits that MOF have every where …… It's all in what you've got in hand and $$$ …… I am thinking you are referring to a mix'd product and not clear rock ??? …. as long as the terrain is not really steep and you lay your material thick enough it should never cause an issue ……. I use often a screened 6" minus pitrun from one of my suppliers …. its better than straight pitrun because it blends the silt with all the sand and rock evenly …. the silt is your binding agent ! …… I've used this for driveways (@ only 6" thick) and at our local VFD where we have to be able to access the Trucks 24/7 … 365 ….. and during the softest times at Break-up ….. these heavy Engines are turning around , backing into the building with a 3-point turn around system every time and they DO NOT sink down into the gravel more than a 1/2" at it's softest time if the year (right now … LOL) even when the Rookies Dry Steer !!! ……. Done properly it carries just as well as crushed Road mulch ……. Heck I'll bet the Island Hwy they used it as the base material before they went to the finer crush over-lays …… Remember it's All in What you Have $$$$$ ……………Cheers !!!
It is used a lot around here. It is very rough and can never be smoothed out really and can be very dusty depending on the fines. That said it seems to not move around or rut out like small crushed product can do nor does it pump mud very much and water pretty much drains through it. It does seem to washboard out pretty fast and there are always loose cobbles laying all over the surface and more than once I have had one of them find the only sharp corner on the particular rock and drive right through the center of a tire tread and wreck a truck tire. Both at high speeds and low speeds with heavy load. I suppose answers may vary depending on the pit you are getting it from but here it usually has mostly fine sand in place of fine silt all the way up to the fist size cobbles.
Not sure about the product you you are talking about, but 6" stones would be about the right size to jam between dual wheels and wreck two tyres at once. If you drive over them long enough, Murphy's law dictates that this will happen. Cheers, Greg
I know for a fact they can take out tires on a kenworth 10yd dump... and yes we use it for logging roads from a borrow pit because of cost.
Give us a little info on what your 6" cobble is. Does it have everything from 6" down to fines? Or is it a screened product? Here in the Southeast, 6" stone would be surge stone. It comes in sizes from 6" to 2-3" with little or no fines. Anything larger than 6" would be class 1 rip-rap. The terminology of stone types is a regional definition, give us a little more info.
Well not six inch, but I've hauled 4inch down to 1 1/2 inch crushed rock for pipeline laydown station. Did one last summer and looking at one coming up this week... Placing it 6 inch deep cover with 6 inches of crushed road base.
I've never had a tire(s) or rims (and I ran Alcoas on everything) … get wrecked by round rock ever …… but have had a few over the years with the jagged edged crushed, or rip-rap, slicing the side walls open between the duals and on the face …..
I hear what you're saying Craft, round rock is probably fine. Of course....... Murphy's law also states that, having made the above statement, you now run a much greater risk of tyre damage for a couple of weeks!! Good Luck, Greg
the product I am referring to is a 6"- clean cobble, most commonly used as drain rock. It does not have fines in it, It ranges from 6" down to about 2". Yes a lot of it is the perfect size to get stuck in between the duals, especially when the loader operator doesn't give his bucket a shake after he takes a scoop from the stockpile and drives the main haul road spilling half a yard as he flies up there!!!:badidea ANYWAYS... As per how the road is being constructed it may be a little different than what y'all are used to since its a landfill but here goes... So on top of the compacted waste we use wood waste about a foot thick that is smoothed out and walked in with the excavator, then we put a silt fabric down (we used to use roofing shingles instead of fabric), then we start putting our rock down... depending on the operator the next two layers can go down in either order.... pit run 6" to a foot and then the Cobble 6" to a foot..... then to top it off 3/4" clear... I will try to get some pics of the material posted later today or tomorrow morn... Hope this gives everybody a better idea of the what n how.
to me the most important part of the 6" rounded stones getting caught in between the duals is that, from where the stones could get caught in between the duals to a public road way is less than 1 km... if a trucker doesnt catch notice it on the way out the gate, someone could die if that rock flies out at the wrong time..
Its also spec'd in a lot of jobs to be placed at the entrance area of a construction project to knock the mud off truck wheels b4 entering main highways. I've placed it on a couple Walmart new construction sites.
I like #2 crushed limestone for construction entrances.
If it is cost effective...mount super singles? I think they're about $1000 a pop.
Just to give an update, the round about is pretty mangled after just a month and a half of use. The silt fabric and wood waste are pushing through in a few spots.